Free Software

[PcTed]

Anti-Virus
Avast
AVG
Clam (Multiple platform AV)
Free AV

Parental Controls
K9 Web Protection - http://www1.k9webprotection.com/

Mac OS X
Instant Messaging: Adium
Gecko-based browser: Camino
Play-anything media player: VLC
Sync iTunes to any device: SyncTunes
Snoop wireless networks: iStumbler
Extensive OS X twiddler (supersedes any and all things like OnYX and Cocktail): CLIX

Audio/Video

http://amarok.kde.org/ Music Player and advanced collection organiser with song tagging features
http://www.ardour.org/ Digital audio workstation, record, edit and mix multi-track audio
http://audacity.sourceforge.net/ Audio Editor
http://azureus.sourceforge.net/ BitTorrent
http://www.cdburnerxp.se CD Burner
http://cdexos.sourceforge.net/ MP3 Ripper
http://www.dbpoweramp.com/ Cd Ripper & Audio Converter
http://www.mrbass.org/dvdshrink
http://www.dvd43.com DVD Region Decoder
http://www.foobar2000.org/ Music Player and advanced collection organiser
http://www.gbpvr.com Personal Video Recorder
http://home.hccnet.nl/h.edskes/mirror.htm
http://http://www.afterdawn.com/software/video_software/video_players/media_player_classic.cfm
http://www.magnusbrading.com/mp3ts/ MP3 Editing Tool
http://www.mp3tag.de/en/ MP3 Tagger and Renamer
http://http://www.softpedia.com/progDownload/RipItMe-Download-44816.html#download_locations DVD Ripper and Shrinker
http://www.erightsoft.com/SUPER.html Simplified Universal Player Encoder & Renderer: Decode and re-code any format a/v
http://www.videolan.org/vlc Video Player (also known as VLC Player)
http://www.virtualdub.org/ Movie Editing
http://www.winamp.com Music Player
http://www.yousoftware.com/tunes iTunes Menu Bar Controller

Documenting
http://www.foxitsoftware.com/pdf/rd_intro.php PDF Reader
http://www.liquidninja.com/metapad Notepad Alternative
http://notepad-plus.sourceforge.net/uk/site.htm Ditto
http://www.openoffice.org Alternative to MS Office
http://www.openworkbench.org Alternative to MS Project
http://www.acropdf.com/ Adobe Acrobat plugin culler
http://www.primopdf.com PDF Generator
http://www.textpad.com Text Editor (I don't think this is freeware- shareware maybe?)
http://sourceforge.net/projects/winmerge Document Comparison and Merging Tool

File Transfer
http://pingpong-abc.sourceforge.net/ BitTorrent Client
http://software.visicommedia.com/en/products/aceftpfreeware/ FTP
http://filezilla.sourceforge.net/ FTP Program
http://www.putty.nl/download.html Telnet/SSH Client
http://www.smartftp.com FTP Client
http://www.utorrent.com/ BitTorrent Client

Imaging & DeskTopPublishing
http://www.faststone.org/FSViewerDetail.htmImage viewer/converter/resizer/editor
http://www.fegi.ru/geohtml/down Image Map Maker
http://www.gimp.org Image Editor similar to Photoshop
http://www.inkscape.org Vector Graphics Editor
http://www.irfanview.com
http://www.neatimage.com/index.html?37 Digital Image Noise Reducer
http://www.getpaint.net
http://picasa.google.com/index.html
http://www.scribus.net DTP Software that helps creating PDF and printed matters
http://www.vso-software.fr/products/image_resizer/ Resize on right click

Instant Messaging
http://pidgin.im/ Multiple IM protocol client (MSN, ICQ, IRC, Yahoo/AIM, etc)
http://www.ceruleanstudios.com/ Ditto

Internet Browsers & Accessories
http://www.iespell.com Spellcheck addond for IE
http://www.firefox.com Internet Browser
http://www.mozilla.org/products/thunderbird/ E-mail client
http://www.opera.com Internet Browser
http://spellbound.sourceforge.net/ Spell Checker for Firefox

Networking
http://www.d3tr.de
http://www.kismetwireless.net/ High-End wireless network detector, sniffer, and intrusion detection system
http://www.logmein.com Remote Computer Access
http://www.netstumbler.com/downloads WLAN Hotspot Detector
http://insecure.org/nmap/ Network Scanner
http://www.privoxy.org Web Filtering Proxy
http://www.proxomitron.info - Web-filtering proxy
http://www.uvnc.com/features/index.html Feature-packed version of below
http://www.vnc.com Remote Computer Access

Programming
http://www.microsoft.com/downloads/details.aspx?FamilyID=fe6f2099-b7b4-4f47-a244-c96d69c35dec&displaylang=en Microsoft .NET 2.0 SDK for Use with above
http://sourceforge.net/projects/dev-cpp Windows Development Environment
http://sourceforge.net/projects/sharpdevelop Very Good C# Development Tool

Security
http://sourceforge.net/projects/axcrypt/ File encryption & secure deletion.
http://www.ethereal.com/ Network virus scanner, pop3 password cracker and all that good stuff
http://keepass.info Password Storage Program
http://www.kerio.com/kpf_home.html Firewall
http://www.sygate.com Firewall
http://www.xp-antispy.org
http://www.zonelabs.co.uk Firewall

Spyware
http://www.lavasoftusa.com/software/adaware/
http://www.spywareinfo.com/~merijn/programs.php Tools for removal of spyware
http://www.hitmanpro.nl/hitmanpro Anti-Spyware
http://www.safer-networking.org/en/ Anti-spyware
http://www.javacoolsoftware.com/spywareblaster.html
http://www.microsoft.com/athome/security/spyware/software/default.mspx

Web Design
http://www.htmlvalidator.com/lite/
http://www.nvu.com Dreamweaver style HTML editor
http://www.mpsoftware.dk/phpdesigner.php

Miscellaneous
http://ccollomb.free.fr/unlocker/ Unlock those annoying locked files and folders in Windows so you can delete, move or rename them.
http://www.autoinsult.com Automatic Insult Generator
http://www.ccleaner.com Cache Cleaner
http://www.educ.umu.se/~cobian/cobianbackup.htm Backup Program
http://www.copernic.com PC Indexer and Searcher
http://www.giganews.com/test_connect.html
http://www.speedtest.net/
http://www.microsoft.com/resources/sam/msia.mspx MS Software Network Auditor
http://www.stardock.com/products/objectdock/ Program Dock
http://cpuid.com/pcwizard.php PC Benchmark Program
http://spambayes.sourceforge.com Spam Filter
http://www.ntwind.com/taskswitchxp/ Alt-Tab Replacement
http://www.rarlabs.com
_________________
http://www.artforums.co.uk/ Online community for artists and artlovers.
http://www.scubabrucie.com/ My SCUBA diving forum.
http://harbury.villagebuzz.co.uk/
http://www.bruceongames.com/ games industry blog