Glosbe - Huge collaborative massively multilingual dictionary.

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.

VerbAce - VerbAce-Pro is an easy-to-use Desktop Translation Software. Translate in a mouse click

Synonymful - Improve your vocabulary and communicate like a pro.

Visuwords - The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus.

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.