UX Challenges - Done reading about UX? Start doing it.
Vocalist - Vocalist is an all-in-one music utility.
Befront - Learn UX/UI design skills in practice with bite-sized tasks
Vanido - Vanido is a singing coach in your pockets.
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.
Weekly UX Exercise - Receive challenges top companies use to interview designers