SpamAssassin in a Box also contains a Windows system service.
SpamBully spam filter for Outlook, Outlook Express and Live Mail
Protect your organization from time consuming spam / phishing
Block the Google cookie to search anonymously.
Comprehensive, multi-layered protection against email-borne viruses and spam.
Free
Powerful anti spam filter for use with Mail Transport Agents (MTA)
Advanced malware protection that works - Heavy on security, light on resources
Spyware analyzer tool for spyware isolation purposes.
Spam / phishing filter for Outlook/Thunderbird/Live Mail. Download free!
Remove Spyware, Clear your Tracks, Secure your Computer from Hackers.