Open Source Windows - A simple list of free, open-source software for Windows.
Free and open-source software is good for you and for the world. This is the best Windows software that we know of.
No adware, no spyware, just good software.

Web Browsing

firefox

Mozilla Firefox

The premier free, open-source browser. Tabs, pop-up blocking, themes, and extensions. Considered by many to be the world's best browser.
Download Page

Video Player / Video Podcasting

miro

Miro

Beautiful interface. Plays any video type (much more than windows media player). Subscribe to video RSS, download, and watch all in one. Torrent support. Search and download from YouTube and others.
Download Page

IM - Instant Messaging

gaim

Pidgin

Connect to multiple IM accounts simultaneously in a single app, including: AOL IM, MSN, and Jabber.
Download Page

E-mail

thunderbird

Mozilla Thunderbird

Powerful spam filtering, solid interface, and all the features you need.
Download Page

RSS

rssowl

RSSOwl

Solid cross-platform RSS client.
Download Page

Peer-to-Peer Filesharing

cabos

Cabos

A simple, easy to use filesharing program. Gnutella network.
Download Page
gnucleus

Gnucleus

A very good Gnutella search and download filesharing program.
Download Page
azureus

Azureus

A powerful, but complicated BitTorrent client. So many features you'll lose your mind.
Download Page

Video Playback

VLC

VLC

Plays more video files than most players: Quicktime, AVI, DIVX, OGG, and more. Pretty good interface.
Download Page
MPlayer

MPlayer

Similar to VLC-- plays loads of video formats.
Download Page
media player classic

Media Player Classic

Compact, but powerful media player. Plays anything under the sun. No install necessary.
Download Page

DVD Ripping / Video Conversion

media coder

Media Coder

Great tool for ripping CDs, DVDs, etc and converting between tons of video formats.
Download Page

Word Processing / Office Suites

libreoffice

LibreOffice

Big, full featured suite of tools for word processing and spreadsheets. Compatible with and a free replacement for Microsoft Word documents. Also supports OpenDocument Format.
Download Page
abiword

AbiWord

A word processor. Leaner and quicker than OpenOffice. Compatible with Microsoft Word documents and OpenDocument Format.
Download Page

Podcasting

juice

Juice

Solid podcasting client.
Download Page

DVD Ripping

handbrake

Handbrake

DVD to MPEG-4 ripper/converter.
Download Page

Sound Recording

audacity

Audacity

Simple sound recording tool.
Download Page

Graphics / Photo Editing

gimp

GIMP

Photo editing application that rivals Photoshop in features.
Download Page
paint.net

Paint.NET

Graphics editor with a very nice interface.
Download Page
inkscape

Inkscape

Vector graphics application.
Download Page

FTP / SFTP

filezilla

Filezilla

Excellent FTP program.
Download Page

IRC

xchat2

X-Chat 2

IRC client.
Download Page