Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
prototypr.io - Daily design news, inspiration and deals
Ditto for Developers - Sync the latest copy edits from design to development
ProjectJournal - Godinterest is a place to blog about faith, culture, life and all that other stuff
Kite Compositor - A powerful animation and prototyping application for Mac & iOS.
Atomic - The fastest way to design beautiful interactions