UnityX is the successor of the Unity7 desktop environment created by Canonical for its popular Ubuntu Linux distribution back in 2011 with the Ubuntu 11.04 release. But Canonical pulled the plug on Unity7 after seven years of development, yet the community wasn’t ready for this major change.
In May 2020, developer Rudra Saraswat created an unofficial Ubuntu flavor called Ubuntu Unity, which features the good old Unity7 desktop environment. Now, the Ubuntu Unity creator wants to take Unity7 to the next level and has created UnityX, a modern, yet simple desktop environment.