MailStore - MailStore Home - A 100% free single-private-user desktop solution
Roundcube - Web-based IMAP email client
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.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.
HEY - Email at its best, new from Basecamp.