Jérôme JOUVIE has made his own engine on java. Possibly you will be interested in its workflow…
It works with Android.
I like its model viewer, model importer and glsl generator.
it’s not free, but sources are available in jar files… possibly you will be interested in it.
Yeah, we’re familiar with it and I think some of the developers have looked it over a little. Best case scenario Jérôme would be open to a collaboration, but my previous advances to “one man army” developers have been rather unfruitful to say the least. Some people prefer to work alone, and do a pretty darn good job at it too