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.

Cigati Outlook PST Splitter - Cigati Outlook PST Splitter to break, divide and split PST files by Size, Date, Year, Folder & Email address of the sender, PST File Splitter capable to split large Outlook PST files.

Gmvault - Backup the emails in your Gmail account.

ReliefJet Essentials for Outlook - A large set of useful and easy-to-use tools for every Microsoft Outlook user: Import, export and convert using EML,MSG,TXT and PST formats; remove duplicate items, process attachments and extract addresses; get reports and statistics and even more...

imapsync - Console-based utility for migrating IMAP mailboxes.

Kernel for PST Split - Split large PST file into smaller and manageable PST file with Kernel for PST Split Tool.