Phoronix: ioDoom3 - Open-Source id Tech 4 - Is Dormant

id Software published their Doom 3 / id Tech 4 source-code nearly one year and one day after pushing out the game engine source-code under the GPL license, the ioDoom3 project was born. The ioDoom3 engine project intentions were similar to that of the successful ioquake3 engine as a flavor of the open-source id Tech 3 code-base, but unfortunately ioDoom3 is yet to be as popular...

http://www.phoronix.com/vr.php?view=MTIwNDU