Invision - Prototyping and collaboration for design teams
GetAccept - GetAccept is a Sales tool for electronic signatures and sales document automation.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Document eSign - Cloud based platform for electronic signatures
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Trends - The fastest way to see whats trending on Github