Invision - Prototyping and collaboration for design teams
TrackDuck - Visual feedback for web design and development.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Valist - Automatically created staging environments for every update with a shareable link for testing
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.