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.

Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.

COOLPHABETS - Helping kids around the world learn their native alphabets.

Hashnode App - Hashnode is a free blogging platform for developers who want to plug into the global dev community while retaining ownership of their content.

Fun Learn - Games and Education & Reference

Normal Software - Insights and ideas from businesses outside of tech