Lukyt
Lukyt is a toy project, a small JVM made in Lua supporting Java 6. The most important reason i made it (other than being a toy project) was to run it on the OpenComputers mod. I am currently porting AWT to it to use Java software on OpenComputers.
This also supports a OpenComputers Java API shared with OCJ (link to come, will be released by @TYKUHN2), this way programs are compatible for both way of running Java on OC, its javadoc is available on my website, Lukyt also have a Lua interop, which also haves a javadoc.
Note that unlike Luje, this is aimed towards features: OC and Lua interoptability.
How to use?
The JVM itself can be used by any program and is independent from the command-line program.
The command line program allows to execute classes.
To launch the HelloWorld test, just do:
lua lukyt.lua --classpath=test HelloWorld