YouClap - Challenge and be challenged by friends and brands.
Finger Tap Challenge - Finger Tap Challenge is a simple challenge game that involves two players who will have to tap on the screen as fast as they can to win the challenge from the opponent.
UXTesting - Discover how your mobile users feel
Pun-Generator.org - Online Pun Generator tool help users to generate hundreds of funny pun jokes with examples, It makes really generic and sensible puns for free.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Blogcast - Turn your articles into audio