SPARC is owned by SPARC International, a non-profit. Its specs and everything are open:

http://sparc.org/technical-documents/

One embedded implementation with a ton of supporting I.P. is GPL'd, FPGA-proven, ASIC-proven, and rad-hard in some verisons:

http://www.gaisler.com/index.php/downloads/leongrlib?task=vi...

And then there's Oracle, their badass chips, and their evil ass lawyers. We can stay away from all that. SPARC is better and safer than Oracle but very importantly SPARC != Oracle.