Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Mailspring - Mailspring is a mail client for Mac, Windows and Linux.

Babble - A more personalized social network

Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary

The Bat - The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.