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...

Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.

Softaken OST File Exporter - Softaken OST to PST Converter to repair, recover and convert OST file to PST

MailClark - The Slack bot for external communications

vMail OST to PST converter - vMail OST to PST Converter Software is an easy to use tool to convert Exchange OST file to Outlook PST file as well as EML, EMLX, MSG, MBOX, vCard & vCal formats. This software can also recover mailboxes from corrupt, damaged and encrypted OST file.

Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates