Online Antivirus Scanners

Trend Micro HouseCall (online scan - Mozilla, IE)
http://housecall.trendmicro.com/
Kaspersky Remote Virus Check (send files - Mozilla, IE)
http://www.kaspersky.com/remoteviruschk.html
eTrust Antivirus Web Scanner (online scan - IE)
http://www3.ca.com/virusinfo/virusscan.aspx
Symantec Security Check (online scan - IE)
http://security.symantec.com/sscv6/default.asp
Panda ActiveScan (online scan - IE)
http://www.pandasoftware.com/activescan/com/activescan_principal.htm
RAV AntiVirus (send files - Mozilla; online scan - IE)
http://www.ravantivirus.com/scan/
BitDefender ScanOnline (online scan - IE)
http://www.bitdefender.com/scan/licence.php
Dr. Web Online Check (send files - Mozilla, IE)
http://www.drweb-online.com/en/online_check.asp
PC Pitstop powered by McAfee FreeScan (online scan - IE)
http://www.pcpitstop.com/freescan/
McAfee FreeScan (online scan - IE)
http://us.mcafee.com/root/mfs/default.asp

Online Security Scanners

Symantec Security Check (no Mozilla support)
http://security.symantec.com/sscv6/default.asp
Sygate Security Scan
http://scan.sygatetech.com/
Quick Scan
http://scan.sygatetech.com/prequickscan.html
Stealth Scan
http://scan.sygatetech.com/prestealthscan.html
Trojan Scan
http://scan.sygatetech.com/pretrojanscan.html
Trojan Scan (IE only)
http://www.trojanscan.com/trojanscan/trojanscan.htm

Free Antivirus Scanners

AVG AntiVirus http://www.grisoft.com

Avast! http://www.avast.com

AntiVir http://www.free-av.com

McAfee AVERT Stinger (not a FULL virus scanner) http://vil.nai.com/vil/stinger/

Spyware Scanners

SpyBot Search and Destroy http://security.kolla.de - or - http://www.safer-networking.org/en/index.html

AdAware http://www.lavasoftusa.com

Spyware Blaster/Spyware Guard http://www.javacoolsoftware.com/

Miscellaneous Links

Links to many other tools/scanners (check out the rest of the site for other security programs) http://www.wilders.org/free_tools.htm

Links to free anti-virus and security programs (check out the rest of the site for other free programs) http://www.freebyte.com/antivirus/

Links to online virus scans, online trojan scans, online spyware check, and more http://www.alken.nl/