[wongogue]

There are more. Jay, cosmic and even xfce is writing their new compositor in Rust.

[tvshtr]

Also Pinnacle

https://github.com/pinnacle-comp/pinnacle

[porkloin]

The majority of the projects in this comment chain don't actually independently implement a compositor in Rust - which is a good thing IMHO. Cosmic and Pinaccle at least come from a common core written in rust that is associated with the cosmic project: https://github.com/Smithay/smithay/