MailStore - MailStore Home - A 100% free single-private-user desktop solution
MailArchiva - MailArchiva is an email archiving, email compliance, and e-Discovery enterprise server.
Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.
Vaultastic - Vaultastic’s on-demand SaaS platform provides Protection, Visibility & Control for your Critical Business Data with Agile Cloud Archival.
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.
Safe PST Backup - A free tool to auto backup Outlook PST files.