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- A Guide to Building Secure Web Applications and Web Services
- A massive document covering all aspects of web application and web service security; published by the Open Web Application Security Project (OWASP). (2006) Current stable version is 2.0 (2006) ; 3.0 is the draft version (2006). Also available in Japanese and Spanish.
- A Practical Guide to GPL Compliance - Software Freedom Law Center
- A guide to effective compliance with the GNU General Public License (GPL) and related licenses. It focuses on avoiding compliance actions and minimizing the negative impact when enforcement actions occur. (2008)
- About Debian
- A step-by-step guide on installing Linux software for servers and network installation along with set up for beginners with instructions on configuring a home server. Other Debian resources are included on this site.
- Adding WhatsThis Help To KDE Applications
- "A Non-Programmer's Guide to Participating in KDE, Part 1" A tutorial about contributing to KDE's online documentation. Also available in Spanish.
- Advanced Bash-Scripting Guide
- An in-depth exploration of the art of shell scripting. (2008)
- All About Linux
- Helpful tips and tricks in using and administering Linux.
- All about Linux: 10 Seconds Guide to Bash Shell Scripting
- A concise reference guide to writing Bash scripts. (2005)
- Asterisk Guru - Tutorials and HOWTOs for the Asterisk PBX and VoIP in General
- A resource site for Asterisk, Linux PBX software for VoIP networks, as well as general information on VoIP. This site has tutorials, user forums, reviews, tools, and a database of VoIP providers organized by country.
- BIOS from A to Z
- An in-depth guide to the BIOS chip; covers the basics, tuning, settings, updating, and the Golden Rules. (2006)
- BackSpace and Delete Configuration for Linux (VT, xterm, bash, tcsh, netscape and more)
- Excellent guide to keymapping.
- Bash Guide for Beginners
- A detailed, practical guide to Bash that provides real-life instead of theoretical examples, which is particularly helpful for those new to Bash. The author has a lot of experience as a Linux user, system administrator, and trainer. (2008)
- Beginner FLTK Tutorial
- A useful tutorial for those just starting with FLTK. (2005)
- Blender 3D: Noob to Pro
- A set of Blender tutorials for all levels of users.
- Blender Wiki
- The primary site for Blender (a graphics animation andvideo production program) documentation. Contains user and developer documentation, as well as Bender Wiki writer's documenation.
- Coasterless DVD Burning
- A detailed tutorial on DVD burning for the beginner. (2005)
- Compiling a Custom Linux Kernel
- A detailed kernel-building reference for the 2.4 and 2.6 kernels. Periodic updates and loads of screenshots are provided.
- Computer Technology Documentation Project (CTDP) Linux Operating Systems Section
- Features Augustin Velasco's Linux Manual (4 volumes), Linux Users' Guide, How Linux Works Guide, Linux Files and Command Reference, HOWTOs, Linux Startup Manual, and Linux Programmer's Guide - all available online or in PDF format.
- Control-Escape: Alternative Software, Linux Help
- The aim of this website is to foster, educate and expand the Open Software community; assists computer users in taking CONTROL of their computing environment and ESCAPE the clutches of proprietary software. There is a guide to assist with learning Linux.
- Converting 78rpm records to Modern Media on Linux
- Documents how to convert 78rpm vinyl records to CD using Linux. There is not much information available on this subject so this is a valuable resource. Last updated in 2002.
- DVD Ripping and Transcoding with Linux
- Last updated in 2002; author will not be updating this, but some of the information is still useful and not outdated. Note: this guide is not for the faint-hearted. It involves a lot of compiling code, installing software, doing things on the command line.
- Debian GNU/Linux -- Documentation
- The main site for all Debian documentation.
- Debian GNU/Linux 4.0 (Etch) -- Installation Guide
- Install instructions and downloadable files for all supported architectures. Available in many languages.
- Debian GNU/Linux FAI Guide (Fully Automatic Installation)
- This comprehensive manual includes information on installation, planning and creating the configuration and how to deal with errors. (2007)
- Debian GNU/Linux Reference Card
- Provides new users of Debian GNU/Linux with concise, up-to-date information about the important commands in Debian; available in Catalan, Danish, English, Finnish, German, Hungarian, Polish and Ukrainan.
- Debian GNU/Linux System Administration Resources
- Tips and resources specifically for Debian system administrators.
- Debian Linux Kernel Handbook
- The main goal of this handbook is to serve as a single access point to all kernel-related documentation. It contains the information about the Debian packaging of Linux kernel for the Etch release of Debian (version 4.0). (2007)
- Debian Reference
- A Debian reference guide; includes system installation and administration, basic tutorials, Debian package management, the Linux kernel on Debian, tips & tricks, system tuning, building gateways, editors and CVS. Translated into many languages.
- Debian Wiki
- A resource site for Debian.
- Dev Shed - Open Source Web Development Tutorials
- Web development tutorial site. Includes tutorials, articles, and forums on many topics including: Administration, AJAX, Apache, DHTML, Java, MySQL, Perl, Python, Security, XML, and Zope.
- Documentation - GNU Project - Free Software Foundation (FSF)
- The main documentation site for the GNU Project; available in several languages.
- Documentation Project - The Apache HTTP Server Project
- Complete documentation for versions 1.3, 2.0, and 2.2 (current).
- Documentation for Ubuntu
- The official documentation site for Ubuntu, Kubuntu, and Xubuntu; server and packaging guides can be found here as well. See also the link to the community-contributed documentation on the Ubuntu wiki @ https://help.ubuntu.com/community/.
- Documentation for the X Window System Version 11 Release 6.9 and 7.0 (X11R6.9/X11R7.0)
- The documentation site for X.Org. Information is available either online or in PDF format.
- ESR's Guide to Hacking With GPS
- An introductory guide to writing GPS-aware software; includes basic information about GPS. (2005) N.B.: This is still a useful guide despite the date. Some links are no longer working
- EasyLinux.info - Linux Distribution Guides
- Guides to Linux distributions including Fedora, Gentoo, Mandriva, and Ubuntu. Also included are links to useful open source applications for Linux.
- FOSSwire
- This site offers articles, news, and tutorials about free and open source software for both the individual and enterprise/business user.
- Fedora 8 Installation Guide
- A guide to help the user with some common installation tasks for Fedora 8 (Werewolf). (2008)
- Fedora 9 Installation Guide
- A guide to help the user with some common configuration and installation tasks for Fedora 9 (Sulphur). (2008)
- Fedora Documentation Project
- The main site for Fedora documentation.
- Fedora Installation Guide
- A detailed guide to the install process for Fedora Core 8 and 7 as well as older versions. Available in many languages.
- Field Guide to Firefox 3
- A detailed guide to the new features in Firefox version 3.
- Firefox Add-ons (Extensions)
- An extensive list of currently available Firefox extensions organized by broad subject category. Each entry has a short annotation, a download link, file size, version number and update date. Also included are themes, dictionaries, search engines, and plugins. A multilingual site.
- Fortran 90 for the Fortran 77 Programmer
- This tutorial eases the transition from the common and popular programming language Fortran 77 to the more modern Fortran 90. Now that free Fortran 95 compilers are getting pretty solid, this tutorial becomes relevant for free software programmers. (2006)
- Free Linux Training and Tutorials
- Lots of links to Linux tutorials and training sites.
- FreeOS
- A resource centre for free operating systems.
- FreeSoftware Magazine Tutorial - Writing Device Drivers in Linux
- "Do you pine for the nice days of Minix-1.1, when men were men and wrote their own device drivers?" - Linus Torvalds. Here's your chance to do just that! A detailed tutorial on how to write device drivers like kernel developers. (2006)
- GIMP - Tutorials
- A fine selection of tutorials for the beginner to the expert; also tutorials for photo editing, web and script authoring.
- GNOME 2.14 Desktop Accessibility Guide
- This document describes how to configure, customize, and use the accessibility features of the GNOME 2.14.0 desktop. (2006)
- GNOME 2.6 Desktop User Guide
- A basic guide to the GNOME desktop. (2006)
- GNOME Documentation Library
- The central documentation site for the GNOME project. Includes documentation for users, system administrators and developers. Translations into many languages are available.
- GNOME Documentation Project
- The main site for all GNOME documentation.
- GNOME Library - Administrators
- This site contains documentation for system administrators. Includes the "GNOME 2.14 Desktop System Administration Guide", the "Desktop Administrators' Guide to GNOME Lockdown and Preconfiguration", and the "Gnome Display Manager Reference Manual". Available in many languages.
- GNU Emacs Reference Card
- Covers the basic Emacs commands.
- GNU GRUB (0.97) Simplified for Newbies
- An excellent tutorial for beginners (or those who want a refresher) on the GRUB boot loader. (2007) N.B.: Version 0.97 is currently in feature freeze. GRUB2 is the next version, and according to the developers it is "usable, but we arestill making incompatible changes from time to time. Stabilizing the features is planned in November, 2008".
- GNU Scientific Library -- Reference Manual
- A collection of numerical routines for scientific computing.
- GNU Smalltalk User's Guide
- This document describes installing and operating the GNU Smalltalk programming language. (2008)
- Gentoo Development Guide
- Guide to creating Gentoo packages. (2006)
- Gentoo Linux Handbook
- A centralized documentation source for the Gentoo distribution; available for specific architectures. The handbook has been translated into many languages.
- Gimp-Savvy.com - Learn the GIMP - Tutorials and Resources
- Tutorials and other resources for the GIMP can be found on this site.
- Git Magic
- An introductory guide to git with lots of examples of how to get things done.
- Grip User's Guide
- A comprehensive guide to Grip, a cd-player and cd-ripper for the Gnome desktop. (2004)
- Grub From the Ground Up
- A guide to the Grub bootloader. (2005)
- Heiner's SHELLdorado
- A comprehensive shell scripting resource site for UNIX.
- Home - HughesJR.com - Enterprise Linux Help, Guides, and HowTos
- Help for RHEL (Red Hat Enterprise Linux) clones like White Box Enterprise Linux (WBEL), and Centos; site also has Linux news, Web links and games.
- How to Evaluate Open Source Software / Free Software (OSS/FS) Programs
- A comprehensive document that organizations should use when evaluating OSS/FSS software. (2007)
- How to Hook up PPP in Linux
- A detailed guide to hooking up a PPP link to an Internet Service Provider (ISP) (2002)
- IBM developerWorks - Open Source Projects - System Recovery with Knoppix
- Using Knoppix as a system recovery tool (or what to do when good disks go bad); a little dated (2003), but still useful.
- IBM developerWorks - Open Source Tutorials and Projects
- Resources for open source development and implementation.
- IBM developerWorks : Open source : Technical Library
- Meta site. Free online tutorials, articles and other resources on a wide variety of open source topics, including LPI (Linux Professional Institute) exam prep (101 and 102), Linux sockets, XML, User-Mode Linux. Free registration required.
- IBM developerWorks Article - "Manage Source Code Using Git"
- How to install and use Git, a distributed SCM tool used by Linus and other Linux kernel developers. (2006)
- IPTables Tutorial
- One of the best iptables tutorials available. (2007)
- IT Professionals Article - "Control Printers in Linux From the Command Line"
- How to go about setting up and using a Linux server as a print server. This article is based on command lines available in RedHat Linux 9.0. (2005)
- Introduction to Linux; A Hands-On Guide
- An excellent guide for Linux beginners as well as a reference tool for more advanced users. (2007)
- Introduction to Mozilla - A Manual for First Time Users
- A guide for Mozilla 1.5 in PDF and web formats; available in English, Dutch, French, German and Spanish.
- Introduction to the Linux Operating System - Linux Tutorial - Techcuriosity.com
- An introductory tutorial about Linux for the new user. Topics include: the advantages of Linux, Linux vs. Windows, Linux directory structure, permissions, basic commands, and glossary of terms. (2007)
- Iptables Tutorial 1.2.2
- look* The aim of this tutorial is to explain iptables in a complete and simple way. (2006)
- KDE Documentation
- THE site to visit for all KDE documentation.
- Kernel Hackers' Guide to Git
- A cookbook of recipes for getting up and running with git, Linus' source code management (SCM) software. (2005)
- Knoppix Linux
- A resource site for Knoppix users, developers and testers. Has an extensive documentation section.
- LWN: KHB (Kernel Hacker's Bookshelf) - A Filesystems Reading List
- An annotated list of key file system papers and books. This is an excellent Linux file system resource. (2006)
- Lea (Linux Entre Amis), site d'aide Linux francophone
- A French Linux tips site; includes resources, forums, mailing lists, drivers, software apps., glossary, kernel information.
- Linsec.ca
- This site contains primarily security-related articles, tips, and advice. Also included are tips for using LDAP as an address book, Mac OS X tips, book reviews, and software reviews.
- Linux Accessibility Resource Site
- A comprehensive summary of the work of the Linux accessibility community; includes information on what is currently being done to improve access; lists software projects, documentation, as well as community events.
- Linux Audio Users Guide
- A comprehensive site of HOWTOs and FAQs and other basic documentation. The documentation found on this site mostly deals with sound drivers, recording, MIDI and music production techniques for a GNU/Linux environment.
- Linux Commands Line List
- A table of Linux commands (with brief descriptions for each command) organized into broad subject categories. A multilingual site.
- Linux Journal Article - "Inside TLDP"
- A behind-the-scenes look at the history and evolution of the Linux Documentation Project. (2004)
- Linux Journal Tutorial - Learning to Use X11
- A tutorial discussing how to use X11 fully and effectively.
- Linux Loop
- This site keeps the user "In the Loop" with Linux news, reviews, guides, and tutorials.
- Linux Love - Powered by Linux, Driven by Passion
- A Linux information site which contains articles, tips, help, HOWTOs, tutorials, and news. Organized by subject category. Brought to you by a passionate lover of Linux. :-)
- Linux Man Pages
- A searchable, online Linux documentation site containing the Linux manual (man) pages.
- Linux Mobile Guide
- A guide for users of Linux and laptops, notebooks, PDAs and other mobile computers. Formerly known as the Linux-Laptop-HOWTO. (2005)
- Linux Now - the most complete linux reference
- Site contains documentation, forums, file libraries, and an online, interactive FAQ and tutorial for the Linux community.
- Linux Resources
- Collection of Linux-related tutorials organized by subject category.
- Linux Resources
- Site contains tutorials, HOWTOs, applications, hardware, servers, laptops.
- Linux Security Documentation and Resources
- A comprehensive resouce centre; includes FAQs/HOWTOs, forums, whitepapers, resources on firewalls, host security, cryptography, network security, intrusion detection, securing Linux systems, a quick reference guide, and an administrator's guide.
- Linux StepByStep
- Guides to installing hardware and software on a Linux system.
- Linux Terminal Server Project (LTSP) Documentation
- The place to find all documentation for the LTSP's low cost diskless workstations. Available in a variety of languages.
- Linux Tips
- A tips and tricks information site for all levels of Linux users. This site has a search function and organizes the tips into subject categories convenient for browsing.
- Linux Tutorial: Video, DVD, TV and Multimedia
- Linux video, DVD, TV, HDTV and Hauppauge WinTV PCI card use. Included in this tutorial are links to software, video formats and information pertaining to video multimedia on Linux. This page also includes a tutorial on the use of the Hauppauge WinTV PCI card under Linux. (2007)
- Linux command line tips
- A table of handy commands + descriptions; organized by broad subject. Also available in Brazilian Portuguese.
- Linux-tips.net
- Site contains tips, archives, forums and news.
- Linux.ie :: Articles
- Irish Linux Users' Group's helpful tutorials, tips, articles, reviews.
- LinuxDevCenter Article - "Using and Customizing Knoppix"
- A walkthrough article on customizing Knoppix. (2003) N.B. This article is no longer completely accurate because the implementation of the KNOPPIX distribution's boot process has changed since this article was originally written, although the information for the most part is still accurate.
- LinuxDevices.com - Embedded Linux Distributions Quick Reference Guide
- This guide provides brief descriptions of the currently available commercial and non-commercial sources for embedded Linux distributions and implementations. (2007)
- LinuxPlanet - Tutorials - Linux Partitions: A Primer - Hard Drive Basics
- Contains basic information on Linux partitions; information is still relevant. (2002)
- Loads of Linux Links
- Mandriva Linux Documentation
- The main site for official Mandriva documentation. Available in many languages.
- Motion Guide
- User guide for Motion software detector edited by Kenneth Lavrsen. (2006)
- ONLamp.com Article - "Rethinking Community Documentation"
- An in-depth look at the present and future state of community online documentation for free and open source software projects. The author also discusses the continuing role of books in the documentation process. (2006).
- OOoDocs.Org -- Open Office Documentation Project
- The Free and Open repository and development home for all documentation regarding the use, marketing, and anything else about OpenOffice.
- OSRC: The Operating System Resource Center
- Extensive information about booting, file systems, memory, architecture, and interfacing with other devices; divided into hardware and software sections.
- Official Gentoo Documentation
- The official site for Gentoo documentation; available in many languages.
- Open of Course - Free Open Content Courses and Tutorials
- A multi-lingual (Dutch, English, French, and Spanish) portal of free online Linux and open source software courses and tutorials.
- OpenGL Video Tutorial
- An OpenGL/GLUT tutorial for C++. It's designed for beginners, but advanced enough for experienced developers. Includes both video and text versions. (2007)
- POSTSCRIPT & GHOSTSCRIPT - Internet Resources
- A huge database of resources organized by category.
- Packaging Guidelines - Fedora Project
- A collection of guidelines for writing Fedora packages. Last updated 2007-04-17.
- Postfix Wiki
- A wealth of online resources about Postfix can be found here including the source code and excellent documentation.
- PostgreSQL Technical Documentation
- An excellent, up-to-date site for PostgreSQL documentation, including tutorials, installation guides, known bugs and fixes, cookbooks, reference manuals/guides, books and lots of related resources.
- Procmail Quick Start: An introduction to mail filtering with a focus on procmail by Nancy McGough
- A comprehensive tutorial on Procmail; latest revision: May, 2005.
- Programming in C -- UNIX System Calls and Subroutines using C
- An online manual for C; last substantial update in 1999, however still relevant except the section on The Common Desktop Environment (CDE) which should be ignored.
- Python 2.5 Documentation
- The main documentation site for Python.
- Qt Reference Documentation (Free Edition)
- Trolltech's Qt documentation for the development of free and open software only; organized by broad subject categories.
- Quick Toots
- Articles about Linux audio applications.
- RPM Guide
- A work-in-progress guide to the RPM package manager. (2005)
- RPM Tutorial
- How to build RPM packages.
- Rosetta Stone for Unix
- A Sysadmin's Unixersal Translator; a handy reference chart of equivalences of commands and tasks in various Unices.
- SUSE Linux Administrative Guide
- A comprehensive SUSE guide for version 9.3.
- SUSEGeek
- Articles, HOWTOs, tips, tutorials, and troubleshooting for SUSE and openSUSE.
- Setting Up Subversion
- The primary focus of this concise guide is on obtaining, building, configuring, and using a Subversion repository. (2006)
- SoupToNuts
- A repository of technical articles (including firewalls, working with time on Linux, GMail, virtual filesystem), Linux tips, scripts, and example software covering Postfix, OpenSSH, C and C++, Live Linux CD, MySQL, SQLite, Berkeley DB, Bash and system administration.
- Start linux - Your Guide to starting Linux
- Loads of tutorials, HOW-TOs, tips, and reviews.
- The Definitive Guide to VoIP for Linux Users | VoIP Now
- A comprehensive guide to the best VoIP resources. (2008)
- The GNU C Library Manual
- The GNU C library defines all of the library functions that are specified by the ISO C standard, as well as additional features specific to POSIX and other derivatives of the Unix operating system, and extensions specific to the GNU system.
- The Gutenbrowser Handbook
- A cross-platform application to easily search, download and read free classic literature, in the form of electronic etexts. Classic books republished electronically by the Project Gutenberg. Latest stable release is 0.81, 2005-11-26.
- The Independent Qt Tutorial
- A comprehensive tutorial with lots of examples and links to the official Qt documentation; French and Italian translations available.
- The Linux Documentation Project: Weekly News (TLDP)
- News of the Linux Documentation Project. Issued irregularly.
- The Linux Information Project (LINFO) Home Page
- This project, started and managed by the Bellevue Linux Users Group (BELUG), is dedicated to providing high quality, comprehensive and easily accessible information about Linux and other free software. The user can find HOWTOs on a wide variety of subjects as well as information on Linux commands and advocacy.
- The Linux Terminal - a Beginners' Bash | Malta Linux User Group
- This useful tutorial explains to non-technical users the basics of how to use the Bash shell.
- The Linux Tutorial
- An in-depth and easy to understand introduction to Linux with numerous tutorials and HOWTOs on a wide variety of subjects.
- The QWireless Handbook
- A x86 and iPaq (palmtop) app analyzing wireless LANs; handbook covers installation, general use and data structures.
- The debiantutorials.org Homepage
- A tutorial and information site to assist users in switching from Windows to the Debian Linux desktop without "geekness".
- The netfilter/iptables project
- The premier site for information on Linux firewalls and routers; contains extensive documentation in many languages, mailing lists, downloads, security information, and news.
- Tombuntu
- A Ubuntu and Linux news site. There are also Linux and Ubuntu tips, software reviews, and tutorials.
- TuxMobil: Linux and (Cellular) Phones
- Links to usage documentation about Linux with different mobile phones and Linux software applications for mobile phones.
- U n i x Power
- A Unix information portal; includes FAQs, beginner information, security, news, and magazines and publications.
- Ubuntu Document Storage Facility
- A documentation centre for all flavours of Ubuntu.
- Ubuntu Geek
- Tips, HOWTOS, tutorials, and articles about Ubuntu Linux. Organized by broad subject categories.
- Understanding the Linux Virtual Memory Manager - Online Book
- A comprehensive guide to the Linux Virtual Memory Manager (VM) for the 2.4x and early versions of the 2.6 kernels. This book is part of Bruce Perens' Open Source Series published by Prentice-Hall. (2004) Available for download in PDF format.
- Unixtips.org - he Source for Unix Tips
- A searchable database of UNIX tips organized by category.
- Unofficial Ubuntu 6.10 (Edgy Eft) Starter Guide
- A detailed guide to the 6.10 (Edgey Eft) version; essential reading for Ubuntu users; there are links to older versions of this guide - 6.10 (Dapper Drake) and 5.10 (Breezy Badger); all guides are available in many languages.
- User Manual for GIMP 2
- A new multi-lingual manual for the GIMP. (2005)
- Version Management with CVS - Online Manual
- This is the official manual for CVS; commonly known as "the Cederqvist" (after the primary author, Per Cederqvist), the manual covers repositories, branches, and file maintenance; includes reference material for both CVS users and CVS repository administrators. (2005)
- Video on Linux
- A series of short articles about video production/engineering on the Linux platform.
- Vim Cookbook
- This manual contains instructions for doing both simple and complex operations with VIM.
- Vim as an XML Editor
- A detailed guide to XML editing using Vim.
- Vimdoc
- A central repository of Vim documentation; includes help files in Bahasa Indonesia, French, Japanese, and Russian.
- Welcome to Mandriva Club Knowledge Base
- A wiki-based Mandriva documentation site. Available in many languages.
- Welcome to The PC Guide!
- A detailed PC hardware information guide presented in an excellent, easy-to-understand style. The latest full version of this guide is 2001, but a lot of the information is still relevant and there have been some recent updates.
- What Every Programmer Should Know About Memory
- A comprehensive document on how memory and software interact. This is a nine-part series that deals with topics such as: CPU caches, Virtual memory, NUMA systems, cache optimization, multi-threaded optimizations, memory performance tools, and future technologies. Links to the other parts of the series can be found at the end of part 1. (2007)
- Writing an ALSA Driver
- A comprehensive guide to writing an ALSA (Advanced Linux Sound Architecture) driver.
- Writing udev Rules
- This document introduces the main concepts of udev rule writing. udev is a file system replacement for DevFS on the Linux 2.6 kernel series and beyond. (2006)
- XFig User Manual
- A documentation guide for XFig. Latest version is 3.2.5, 2007-03-31. Also available in Japanese.
- XML Tutorial
- One of the best XML tutorials available for both the beginner and the advanced user.
- YoLinux LDAP Tutorial: Deploying OpenLDAP - Directory Installation and configuration (V1.2 / 2.x)
- A little dated (2004), but most of the information is still useful.
- YoLinux Tutorial - Software Development on Linux
- An extensive tutorial (with links) of the tools for programming languages supported by Linux. Includes compilers, tools, software design, bug tracking, development libraries, autoconf, books and other categories. (2006)
- Zaurus User Group :: Zaurus Users Unite!
- Site contains forums, mailing lists, FAQs, HOWTOs, reviews and Zaurus-related resources.
- Zb - z a z z y b o b . c o m
- A "must see" Linux information site with an emphasis on scripting and general Linux tips.
- ZopeWiki
- A simple, comprehensive, collaboratively-maintained guide to Zope 2.
- refcards.com (tm) - The Source for Quick Reference Cards
- A collection of quick reference cards (browsable by subject category) focused mainly on Free and Open Source Software. Cards are in PDF format.
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