Invision - Prototyping and collaboration for design teams
LinkNow Media - LinkNow Media creates affordable and effective websites for small businesses.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Justinmind - Define awesome experiences through wireframes & prototypes.