Jx9: A direct competitor to Lua
jx9.symisc.net
jx9.symisc.net
Lua: MIT: can be used in closed source software.
Jx9: Symisc Public License (basically the Sleepycat license): Very similar to the GPL in that all source code using it must also be open source upon distribution. Otherwise, a license must be acquired at some unknown price to use it in commercial software.