Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server
Fast Bayesian spam filter along lines suggested by Paul Graham
Conversion from *.mht files to *.htm files.
Super simple mail merging for Mac OS X using CSV and Mac's Mail.app
Synchronizes the Mac OS X Address Book to and from an XML-based format
Python + espeak gmail checker
Liberté Linux: Mission-critical stealth communication