Knuckles suggested a trojans-viruses forum in one of the other threads. I say: let's make it a thread
Anti-virus software:
Symantec
Sophos
Trend Micro
AVG
F-Secure
McAfee
ThunderByte
Panda
Kaspersky
On-line virus scanning:
Trend Micro
McAfee
Hoaxes:
F-Secure
Panda
Trojan detection:
Tauscan
Moosoft
Hope this helped... Feel free to add your own...