Freeplane - Freeplane is a powerful and free software for building mind maps.
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.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
Pencil Project - Single-user mockup / wireframing / diagramming tool
Busuu - Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .