The applications introduced here are free as in "free beer" and most of them are also free as in "free speech". Of course, the first are fully working applications and not some trial version software that expires after 15 days or so (a few are limited editions though, meaning that all the features of the full commercial versions might not be availlable).

Browsers
Mozilla Mozilla
Mozilla is an open-source web browser and toolkit, designed for standards compliance, performance and portability.
OS:LinuxMac OSWindows
License:Open Source
website
Phoenix Phoenix
Phoenix is a redesign of the Mozilla browser component, similar to Galeon, K-Meleon and Chimera, but written using the XUL user interface language and designed to be cross-platform.
OS:LinuxWindows
License:Open Source
website
K-Meleon K-Meleon
K-Meleon is a lite Web browser based on gecko (the mozilla rendering engine). It's fast, has a minimal interface, and it is fully standards-compliant.
OS:Windows
License:Open Source
website
Amaya Amaya
Amaya is a browser/authoring tool that allows you to publish documents on the Web. It is used to demonstrate and test many of the new developments in Web protocols and formats.
OS:LinuxMac OSWindows
License:Open Source
website
Opera Opera
Opera is a fast, user-friendly, versatile Internet/intranet browser that also includes a newsreader. The keyboard plays an integral role in surfing, which can make moving around the Web easy and fast. You can run multiple windows even at start-up, and special features are included for users with disabilities. Opera supports CSS, Java, JavaScript SSL (128-bit), TLS (Transaction Layer Security), and more. Opera also features integrated search and instant messaging; support for new JavaScript versions; e-mail support; improvements in memory usage; and accessibility to different Web sites.
OS:LinuxMac OSWindows
License:Free
website


Network Software
FileZilla Filezilla
FileZilla is a fast FTP client for Windows with a lot of features. FileZilla Server is a reliable FTP server.
OS:Windows
License:Open Source
website
Gaim Gaim
Gaim is an all-in-one IM client that resembles AIM. Gaim lets you use AIM, ICQ, Yahoo, MSN, IRC, Jabber, Napster, Zephyr, and Gadu-Gadu, all at once.
OS:LinuxWindows
License:Open Source
website
Jabber Jabber
Jabber is an open platform for instant messaging and a whole lot more.
OS:LinuxWindows
License:Open Source
website
Trillian Trillian
Connects to all major chat networks, including AIM, MSN, ICQ, Yahoo!, and IRC simultaneously!
OS:Windows
License:Free
website
X-Chat X-Chat
Xchat is a graphical IRC client.
OS:LinuxMac OSWindows
License:Open Source
website
Gnucleus Gnucleus
Gnucleus is a Gnutella client for Windows that allows you to share files over the Gnutella network. All files are hashed during idle processor time with SHA1. Alternate locations are given and collected when transferring files. A new Gnutella Web-based cache system was created and developed by the Gnucleus team is included. With the new research system, Gnucleus never stops looking for more sources. Transfers are saved between program runs. It has Keep-Alive support for multisource uploads and no spyware.
OS:Windows
License:Open Source
website
WinMX WinMX
WinMX is a FREE file-sharing program like no other. It allows you to connect, download, and share files with MILLIONS of other users through the decentralized WinMX Peer Network. Once WinMX is installed, you'll have access to one of the largest and most diverse networks of shared media files in the world. And unlike many other 'peer to peer' software providers, we respect your privacy and will never sell you out to spyware. When you download WinMX, you're getting WinMX and only WinMX, no bundled spyware, no ads, no B.S.
OS:Windows
License:Free
website
PuTTY PuTTY
PuTTY is a free implementation of Telnet and SSH for Win32 platforms, along with an xterm terminal emulator.
OS:Windows
License:Open Source
website
Graphics
IrfanView IrfanView
IrfanView is a very fast freeware (for non-commercial use) 32-Bit graphic viewer for Windows with support for multiple (animated) GIF, TIFF and ICO files.
OS:Windows
License:Free
website
GIMP GIMP
The GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software suitable for such tasks as photo retouching, image composition and image authoring.
OS:LinuxWindows
License:Open Source
website
Blender Blender
Blender is a cross plaform 3D creation suite, allowing fully integrated modeling, animation, rendering, post production and interactive 3D creation and playback.
OS:LinuxMac OSWindows
License:Open Source
website
Maya Maya Personal Learning Editionr
Maya Personal Learning Edition gives 3D graphics and animation students, current industry professionals, and those interested in breaking into the world of computer graphics (CG) an opportunity to explore all aspects of the award winning Maya Complete software in a personal, non-commercial capacity.
OS:Mac OSWindows
License:Free
website
Music/Audio
Winamp Winamp
Winamp is an audio player that can handle audio CDs, MP3 audio files, and streaming audio broadcasts. It combines extensive functionality with an intuitive interface. Winamp features a playlist editor and a 10-band graphic equalizer with user-definable presets that can automatically load specific files. It also includes Windows Media Technology 4.0 input/output support and the industry-standard Fraunhofer MP3 decoder. This download no longer includes VIS/DSP plug-ins; you can download them separately. Winamp 3 plays MPEG Layer 2 (MP2) and Layer 3 (MP3) audio streams and Windows Media Audio (WMA), and combines extensive functionality with an intuitive interface. Winamp 3 revamps the entire idea of a skinning system by allowing developers to add entirely brand-new functionality within their own skins.
OS:Windows
License:Free
website
CDex CDex
CDex is a utility of extraction (ripping) any audio files from an audio CD. The files can be ripped in either the plain WAV format or to a compressed file format (CDex supports many encoders). In addition, it has many additional options to convert between several audio file formats.
OS:Windows
License:Open Source
website
Audacity Audacity
Audacity is a good, simple audio editor suitable for recording, mixing, and editing ordinary tracks of CD-quality audio.
OS:LinuxMac OSWindows
License:Open Source
website

Office Software OpenOffice.org RagTime Software602 AbiWord Video DivX Player VirtualDub Security Sygate Personal Firewall Outpost Personal Firewall Zone Alarm Firewall AVG Etheral PGP Snort Misc. Tools & Utilities 7-Zip CD2HTML CDR Tools Cygwin JZip Unique RARGames
Emulators PCSX Open Source for Windows and Linux