A Product Design Challenge - Get a design challenge to solve real-world problems
Lyrics Training - A game where you fill in the lyrics of your favorite songs
Frontend Mentor - Supercharge your front-end skills by building in a real-life workflow. Solve real-world HTML, CSS and JavaScript challenges whilst working to professional quality designs.
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.
Singscope - See your pitch analyzed as you sing
Lyricsgaps - Learn Languages Online - Exercises Listening - Fill in the gaps