http://goo.gl/2fzeb
http://goo.gl/XEQ80
Tor (install)
http://goo.gl/TdiP
TOR and SSH Tunnels
http://goo.gl/UM567
Tails is a live CD or live USB that aims at preserving your privacy and anonymity.
http://goo.gl/LFdmX
Incognito Live System CD
http://goo.gl/Fr4wz
....
OpenDNS - recommended
http://goo.gl/DJD34
OpenDNS - no reg. required
simply add to your Network DNS settings (PC/Mobile/Router)
208.67.222.222
208.67.220.220
....
Portable Anti-malware
ClamWin Portable Anti-Virus
http://goo.gl/20xO
Spybot - Search & Destroy
http://goo.gl/VjPnP
McAfee Labs Stinger
http://goo.gl/zdSH0
Avast Cleaner
http://goo.gl/IIkt
Dr WebCureIT
http://goo.gl/wiZh
Sophos Anti-Rootkit
http://goo.gl/cBuBP
F-Secure BlackLight
http://goo.gl/1zuJL
Snapfiles Freeware
http://goo.gl/moaS9
Security - Malware Detection
http://goo.gl/CZcoQ
....
LiveCD Based
Dr.Web LiveCD - recommended - end-user friendly
will clean your computer of infected and suspicious files, help you copy important information to a removable data storage device or another computer, and then attempt to cure infected objects.
http://goo.gl/7n2R
Kaspersky Rescue CD
http://goo.gl/rZ7mV
BitDefender Rescue CD
http://goo.gl/6ZkWw
Avira Antivir Rescue CD
http://goo.gl/JEsJd
....
Ubuntu
http://goo.gl/kG5E
Lubuntu
http://goo.gl/Q0uj
Mint Linux
http://goo.gl/bFts
....
Recovery - Cloning - Misc
SystemRescueCd
http://goo.gl/btTJ
clonezilla
http://goo.gl/VqGk
clonezilla-sysresccd - recommended - end-user friendly
http://goo.gl/o2WO2
Trinity Rescue Kit CD
http://goo.gl/lf3Ri
Windows Antivirus - Linux LiveCD's
http://goo.gl/Un1zw
GParted LiveCD
http://goo.gl/zQpz
Ophcrack LiveCD
http://goo.gl/MfEE
Parted Magic
http://goo.gl/G6wz1
BackTrack
http://goo.gl/hGeNf
Honeywall
http://goo.gl/EMti7
Privatix Live-System
http://goo.gl/E7uEn
List of live CDs
http://goo.gl/ofzcz
....
Online Antivirus Scan
HouseCall - TrendMicro
http://goo.gl/f2op
Bitdefender
http://goo.gl/tTX4
F-Secure
http://goo.gl/58GXV
Norton Security Scan
http://goo.gl/8sxP
Eset
http://goo.gl/IMGhu
....
Browser Extensions
Ad Block Plus
http://goo.gl/Qgos
McAfee Secure URL Shortener
http://goo.gl/p5Q5
FlashBlock
http://goo.gl/h5NFN ( firefox )
http://goo.gl/NV9jF ( chrome )
NoScript
http://goo.gl/R163
Torbutton
http://goo.gl/rYuy8
BetterPrivacy
http://goo.gl/TL79Z ( firefox )
HTTPS-Everywhere
http://goo.gl/fsKV