Panda Active scan - http://www.pandasoftware.com/products/activescan.htm

A-Squared Anti-Trojan -- http://www.windowsecurity.com/trojanscan/
BitDefender -- http://www.bitdefender.com/scan8/ie.html
Ewido Anti-spyware -- http://www.ewido.net/en/onlinescan/
F-Secure -- http://support.f-secure.com/enu/home/ols.shtml
House Call (Trend Micro Anti-Virus) -- http://housecall.trendmicro.com/housecall/start_corp.asp
Kaspersky -- http://usa.kaspersky.com/services/free-virus-scanner.php

There are more besides these. There are also free programs that will do the same that are listed in the welcome thread that is stuck at the top of the page.