Source codes of RELEASE completely closed.
On MStar Saturn 6 platform RELEASE is staticaly linked to uClibc which is under LGPL, LG provide object files and toolchain to build RELEASE:
In latest firmwares for year 2010 TV models, RELEASE is dinamically linked to uClibc.
RELEASE use NanoX windows manager: http://www.microwindows.org/
And the corresponding part/modified part of NanoX has been given by LG and is in Open Source code archive.
Full NANOX sources used in RELEASE (LG sent it with sources for US model LH50): http://dl.dropbox.com/u/490148/nanox.tar.bz2
There are several patches for RELEASE, which alter certain functional. See LGMOD Patches for RELEASE