AFUL: French-speaking Linux and Libre Software Users’ Association

Free Software Foundation

The FSF also has sister organizations in France Latin America Europe and India.

Ohloh is an open source directory that anyone can edit. It features comprehensive metrics and analysis on thousands of open source projects.

freshmeat maintains the Web’s largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat database, and links to new code are added daily.

fossfor.us lists free open source software for various platforms sorted by category, allows users to browse by function or by alternative for proprietary products. All free open source software - many excellent alternatives to expensive proprietary products.

Pour les formats ouverts !
Le site Formats-Ouverts.org, (FOo), traite des standards ouverts (formats, protocoles) dans différents domaines (comme l’interopérabilité, l’archivage et presque partout)

Wubi is an officially supported Ubuntu installer for Windows users that can bring you to the Linux world with a single click. Wubi allows you to install and uninstall Ubuntu as any other Windows application, in a simple and safe way. Are you curious about Linux and Ubuntu? Trying them out has never been easier!

PlayOnLinux is a piece of sofware which allows you to easily install and use numerous games and softwares designed to run with Microsoft®’s Windows®.

ReactOS® is a free, modern operating system based on the design of Windows® XP/2003. Written completely from scratch, it aims to follow the Windows-NT® architecture designed by Microsoft from the hardware level right through to the application level.

LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux, that gives you six feature-rich applications for all your document production and data processing needs: Writer, Calc, Impress, Draw, Math and Base. Français et son wiki

Deutsch

KOffice is a free open source office suite which is available for Windows, Linux and Mac OS X. It contains a word processor (KWord), a spreadsheet application (KSpread) and a presentation program (KPresenter). Windows installer

AbiSource - Open Source for the Desktop.
AbiWord is a free word processing program similar to Microsoft® Word. It is suitable for a wide variety of word processing tasks.

AbiWord allows you to collaborate with multiple people on one document at the same time. It is tightly integrated with the AbiCollab.net web service, which lets you store documents online, allows easy document sharing with your friends, and performs format conversions on the fly.

Scribus is an Open Source program that brings award-winning professional page layout to Linux/UNIX, Mac OS X, OS/2 Warp 4/eComStation and Windows desktops with a combination of "press-ready" output and new approaches to page layout. Underneath the modern and user friendly interface, Scribus supports professional publishing features, such as CMYK color, separations, Spot Colors, ICC color management and versatile PDF creation.
Scribus 1.3.3.13 for Windows (TM) installer

Firefox web browser | Faster, more secure, & customisable | Mozilla Europe

Opera web browser - Opera is the only Web browser that comes complete with everything you need to be fast, safe and productive online. No, it’s not Open Source and doesn’t belong here. But it’s just too good NOT to mention with other "free" software packages.

SeaMonkey - Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing made simple — all your Internet needs in one application.

Portable version

Linux Mint is an elegant, easy to use, up to date and comfortable GNU/Linux desktop distribution.

Ubuntu is a community developed, Linux-based operating system that is perfect for laptops, desktops and servers. It contains all the applications you need - a web browser, presentation, document and spreadsheet software, instant messaging and much more.

Debian — The Universal Operating System
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.

Mandriva Linux, offers all the power and stability of Linux to both individuals and professional users in an easy-to-use and pleasant environment.