My current list is:

* Rust on Embedded (OneVariable GmbH, Sarif, Tweede golf) 5-280
* Ferrocene for Rust/Ferrous Systems 4-402
* Rust Engineers/Yalantis 5-320b
* GNAT Pro/AdaCore - 4-148
* KDAB - 4-302
* Slint - 4-300
* JetBrains - 5-474