Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
SysInfo PST File Viewer - Outlook PST File Viewer Tool enable users to open, view or read PST files without requiring Outlook, it scans all the important items of PST such as calendars, contacts, notes, tasks and journal entries etc.
Mailpile - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Email Format - Email Format helps to quickly find the email address format for large and small companies alike.
Postbox - The Power Email App for busy professionals, like you.
SysInfo Outlook Duplicate Remover - SysInfo Outlook Duplicate Remover is a tool to delete duplicate mailbox items from Outlook PST file.