NausicaaMod tries to bring the world of Ghibli into Minecraft! Currently has stuff from Nausicaa of the Valley of Wind, and Laputa. Currently working exclusively on Laputa.
License:
Basically: http://www.wtfpl.net/
Technically: The MIT License is a permissive license that is short and to the point. It lets people do anything they want with your code as long as they provide attribution back to you and don't hold you liable.