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.

Notepin - Extremely simple note-taking + blogging ✍️

Lingvist - Lingvist helps you take your foreign language skills to the next level with a broad selection of exercises and lessons.

Agenda - A date-focused note taking app for both planning and documenting your projects.

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.

Recollectr - Minimally disruptive, maximally efficient note-taking — record and recall without breaking your flow.