Precursor - Precursor helps designers and developers communicate and collaborate in real time.

Figma - Team-based interface design, Figma lets you collaborate on designs in real time.

mi.team - Collaboration app with chat, task board & video conference

Issuu Collaborate - Issuu Collaborate offers a way for teams to work together on creating content for publishing.

Justinmind - Define awesome experiences through wireframes & prototypes.

Moovweb - Moovweb makes the web instant and simple.