Xmind - Xmind is a brainstorming and mind mapping application.

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.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.

Coggle - Coggle is a simple, beautiful, powerful way of structuring information.

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