[jerven]

In this case it is Azul Zing, a very serious product. It's one of the four major VM Jit compilers (OpenJ9, C2, Graal are the others in my opinion)

[1] https://www.azul.com/products/zing/

[pjmlp]

There are also PTC, Aicas, Virtenio, Ricoh and Gemalto all targeted to embededded deployments, of which, PTC and Aicas are the most well known ones.

Sadly Excelsior is no more. I imagine that regular JIT compilers making AOT/JIT caches available, is what killed them.