Uxcel - The easiest way to learn UX/UI design
Challenged - Create and participate in video challenges of any kind.
Daily UI - Become a better designer in 100 days
Peeky - Peeky is a website builder for creatives. Create beautiful image galleries and portfolio sites online.
GoodBrief - A random generator for design briefs.
Harlem Shake Super Dance Yourself - Create cool dancing videos and share them.