With Oracle poised to go Freemium on Java, directories of JVM alternatives are getting plentiful. But this one included some useful (if niche) alternatives. In addition to
all the usual suspects” there is a Java-to-C version, and a Mono/.Net compatible version listed near the end.
JC Virtual machine converts Java class files to C source code. It could also compiles with GCC and loads them with built-in ELF loader. Additional to that, JC provides a complete Java runtime with optimization to increase performance.