Hixus Email Address Protector 

Prevent spam robots harvesting your email address from your website and help reduce the amount of spam you receive as a result.
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xTang 

xTang is a fully windows explorer integrated mail program with html-mail support, spam protection, spell checking in 20 languages and easy to use message rules. Includes routines for converting from your old mail program to xTang.
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0Spam.com Express 

The most powerful, next generation anti spam software, 0Spam.com Express is compatible with all versions of Windows and most E-mail clients, safely removes spam from your existing POP3, Yahoo, Hotmail, GMail, or IMAP accounts, and many cool features.
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