Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Invision - Prototyping and collaboration for design teams
Issuu Collaborate - Issuu Collaborate offers a way for teams to work together on creating content for publishing.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Moovweb - Moovweb makes the web instant and simple.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.