Best free Anti Virus (AV-Comparatives score in red)
Avast……………………….antispyware and antirootkit protection included, 97,6%
Avira AntiVir……………… antirootkit protection included, 99,6%
AVG…………………………antispyware protection included, 98,1%

Best free Firewall (Matousec rating in red)
Comodo Firewall Pro…….. XP&Vista; excellent 95%
Jetico Firewall v.1…………XP;…….very good
Online Armor ………………XP;…… very good 89%

Best free Anti Spyware/Malware (# means recommended)
A-squared ………………………on-demand scanner#
Comodo BOClean…………..real-time memory scanner
Comodo Memory Firewall …buffer overflow detection/protection tool
MalwarebytesAntiMalware..on-demand scanner#
Spybot Search&Destroy….with optional real-time protection
SpyWareBlaster……………blocks websites known for spyware
Spyware Doctor ………..…part of Google Pack, free version has smaller signature file than paid version
Spyware Terminator…../….real-time protection only for XP/Vista 32-bit
SuperAntiSpyware…………..on-demand scanner#
Threatfire…………………..real-time behavioural blocker, 32-bit only#
Windows Defender………./32- and 64-bit version
WinPatrol 2007…………….intrusion detection system/system monitor

Free Anti Rootkit software
Avira Anti Rootkit Tool
AVG Anti Rootkit Free…….XP32 only
F-Secure Blacklight
Panda Anti Rootkit 1.08….XP32 only
RootkitRevealer …………..by Windows SysInternals (use their site/forum for information and questions about this program)
Sophos Anti-Rootkit 1.3.1
TrendMicro RootkitBuster

Online Virus/Spyware/Malware scanners
Bitdefender
Dr. Web CureIt
Eset Online Scanner
Kaspersky
Panda ActiveScan 2.0
PrevX CSI
TrendMicro
VirusTotal………………….Online scanner for individual files, using technology from more than 30 different security outfits.

BootDisks for Virus/Spyware/Malware removal
PC Tools Alternate Operating System Scanner
Avira AntiVir Rescue System

Other free security programs
SandboxIE………………….Create a safe temporary storage area between the web and your HD

Online Firewall Tests
AuditmyPC
Comodo free scan
Hackerwatch.org
PC Flank
Shields Up/Gibson Research Corp.

Independent comparison of most Antivirus programs
Latest On-Demand test results from AV-Comparatives (Feb. 2008); PDF Link

Not sure about these programs?
Then check these independent sites for comparisons and information about the different programs.
AV Comparatives Anti Virus comparison, though not the free versions. Scores in this post are from Feb. 2008 test
Matousec.com Firewall leak tests; percentage scores in red are from June 2008 test. (Jetico 1.0 rating is from Nov. 2007)
Wilders Security A site/forum dedicated to security software

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