Any engines?

Does anyone know what graphic engines are used in games? Are they somehow available or are they company secrets. I write 3D applications using Java 3D (not games but anyway). I sometimes suspect I would be better off using some game engine instead.
[255 byte] By [uj] at [2007-9-27 22:20:49]
# 1
The quake engine is widely used, also for non game purposes, (but it is not java). The same goes for other engines as well, but I don抰 know any examples with Java. Looking to gaming when working with 3d (and other GUI- related stuff), is indeed a good idea, though.
Ragnvald at 2007-7-7 12:42:21 > top of Java-index,Other Topics,Java Game Development...
# 2
Just to activate the thread I'll give you an interesting link, http://www.rolemaker.dk/articles/evaljava/
uj at 2007-7-7 12:42:21 > top of Java-index,Other Topics,Java Game Development...