V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Hornetsecurity Email Archiving - Hornetsecurity Email Archiving is one of the advanced software that offers long-term, unchangeable, and secure storage of important company information, data, and flies.
Google Audience Center - 3 votes and 6 comments so far on Reddit
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.