There are currently various licenses for the modules that compose the JavaFX runtime:
The core JavaFX runtime is still proprietary software and its code has not yet been released to the public,
The JavaFX compiler and an older version of the 2D Scene graph are released under a GPL v2 license,
The NetBeans plugin for JavaFX is dual licensed under GPL v2 and CDDL.

http://en.wikipedia.org/wiki/JavaFX#License