BitDefender Online Scanner - Free and Effective Malware Cleanup Directly from your Browser
Combofix - Excellent Rootkit removal tool
F-Secure Online Scanner
McAfee Security Scan Plus - Checks your computer for anti-virus software, firewall protection, and web security, and threats in your open applications
Norton Security Scan - Scans your computers security to ensure it is safe from hackers exploits
Panda Active online scan