Microsoft Whiteboard - The canvas where ideas, content, & people come together.
Wayland - Wayland is intended as a simpler replacement for X, easier to develop and maintain.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
Y Window System - Y Window System is a platform that allows you to improve the speed, working, and efficiency of the application in your operating system and helps you to increase the responsiveness of applications similar to any locally based app.
Greenboard - Generate beautiful static api documentation
XQuartz - The XQuartz project is an open-source effort to develop a version of the X.