Tab Notifier - Download Tab notifier for Firefox.
Unibox - Unibox is an application that aims to completely overhaul your email experience. Unibox resorts your email so that you can group the messages you receive by their sender. Read more about Unibox.
PopMan - PopMan is a POP3 and IMAP4 manager.
Kiwi for Gmail - Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and...
Standard Notes - A safe place for your notes, thoughts, and life's work
Wavebox - The powerful productivity browser like no other, multi-account sign-in, tab sleeping, groups & pins