Look to the cookie!

Awesome Freeware!

Online Virus Scanners: F-Secure, Windows OneCare, BitDefender, Panda, Trend Micro, McAfee, Symantec, Eset NOD32

Email Client: Mozilla Thunderbird

Back up & Restore Mozilla profiles (Firefox, Thunderbird):  MozBackup

Software Firewall: ZoneAlarm, Online Armor Personal Firewall

Antispyware: Spybot Search & Destroy, SuperAntiSpyware, MalwareBytes' Anti-Malware, EMSI Software's a-squared Free, VundoFix Removal Tool (by Atribune), F-Secure's Downadup Worm Removal Tool, ComboFix, Enigma Software's Conficker Removal Tool

Rootkit Removers: Sophos Anti-Rootkit, F-Secure BlackLight

Image Editor: Irfanview, Gimp

Subnet Calculator: Cisco subnet calculator beta, Solarwinds Subnet Calculator

Convert files to PDF: PDF ReDirect

Office Suite: OpenOffice.org

Terminal Emulator: Tera Term Pro

CD/DVD Burning: DVD Shrink, ImgBurn, CDBurnerXP

Mount ISO Files/Virtual Drive Software: SlySoft Virtual CloneDrive
 
Multi-IM Client: Trillian

Registry Cleaner: RegCleaner


Hard Drive Diagnostics/Utilities: Seagate SeaTools (create a bootable floppy), Maxtor PowerMax (create a bootable floppy), Western Digital Data Lifeguard Tools (create a bootable floppy), Active Hard Disk Monitor, HDDScan
 
System Analysis: SIW, Sisoft Sandra, WinDirStat, Speccy
 
Compression/Archiving: 7-Zip
 
 
Data/File Recovery: Recuva
 
Hardware Temperature Monitoring: CPUID Hardware Monitor, Core Temp
 
Remote Acess Software: LogMeIn

Partitioning Tools: GParted

Boot Managers: EasyBCD (great for Vista & Windows 7)

Networking Tools: NetAlyzer, Wireshark
 
Bandwidth Monitoring/Usage: NetWorx