Here are the lists of freeware that u will love to use

3dMark - Benchmarking tools
7-Zip - compression software (very high compression ratio)
Acrobat Reader - For reading PDF files
Album cover art downloader - download album covers
Ad-Aware - Anti-spyware
AP Guitar Tuner
Apache - Worlds most popular http web server.
AudioGrabber - CD ripper / mp3 creator
Auto GK (Gordion Knot) - foolproof dvd to avi software
Autoruns - See what programs are configured to startup automatically when your system boots
Avast! Antivirus - Antivirus software
Avant - Avant web browser
AVG antivirus - Free antivirus prog
AVG Email scanner plugin for use with Mozilla Thunderbird. Setup instructions here.
Belarc advisor - a snapshot of your system details
BitDefender - Antivirus software
Bloodshed Dev-C++ - Free programming editor
CDBurner XP Pro - great replacement for Nero
CDex - For Ripping CD's (also converts to compressed formats (e.g. MP3))
ClamWin - AV software to use in conjunction with AVG
CPUZ - provides some information on your CPU
cygwin - a Linux-like environment for Windows
Daemon Tools - For mounting ISO (and other) images
Damn NFO Viewer - .nfo file viewer
DBan - securely wipe hard drives
Desktop Sidebar - provides lots of useful system / application information.
DeviantArt - Free wallpapers
DIKO - Free AVI to DVD converter
Diskeeper - Shareware defrag utility
DScaler - best video picture quality from TV card
DU Meter - Upload/Download speed for Internet
DVD Decrypter - needed for AutoGK, also handy for copying single layer dvds
DVD Shrink - DVD Ripping program. Can also burn if you have nero installed.
EAC - For those who demand the highest quality ripping their own music collection
EphPhod - manage your iPod
Eraser - securely wipe files or free space
Ethereal - Packet sniffer
Filezilla - FTP client and server software
FilZip - compression software
Firefox - web browser
FLAC - Lossless (i.e. perfect cd quality) music compression
Flash and shockwave players - For running flash and shockwave stuff inside your browser
Foobar2000 - Audio media player
Foxmail - Mail reader
Fraps - handy for taking screenshots of games and monitoring their performance
FreeReader - RSS and XML reader
G4u - Hard Disk cloning
Gimpshop - gimp with photoshop look and feel.
Godfather - MP3, Ogg, etc. tagging
GoogleBar - Google toolbar for Mozilla / Firefox
Gordion Knot - DVD backup software
GPGShell - Front endd to GPG
Hijackthis - lists all installed browser add-ons, other features
ID3-TagIT - manage your mp3 id3 tags
Incredimail - Email prog add-on (emoticons, etc.)
IrFanView - more graphics software
iso buster - Rescue lost files from a bad or trashed CD or DVD
isorecorder - Tool for burning iso files in XP
iTunes - Apple's itunes music player / purchasing tool
Java JRE - For running applets, or anything else java based.
JCreator LE - Free Java editor
K-Lite codec pack - every video and audio codec you could need (and media player classic)
Kerio Personal Firewall
Lavalys Everest - Gives you lots of system information (like sisoft sandra, but completely free)
Mame32 - Arcade machine emulator
MaxLister - allows you to create virtual images of harddrives, floppy disks, CD-ROMs or other removable media
Microsoft regclean - Cleans your registry. COuldn't find a microsoft.com link. This one is for download.com.
mIrc - IRC (chat) client