Reverse Dictionary - Describe a concept and get back a list of words
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.
Words For That - the reverse-Urban Dictionary of the internet
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
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 .
Fire Your Boss - Free (fun) resignation letter generator