The latest version 1.6.3 of GtkRadiant, official level design toolchain for id Tech 3, is now supporting Quakelive and improves Urban Terror support, check the official announce.

Since United States of America TTimo resigned from id, he took over the GtkRadiant project and joined Frozen Sand.

QL support by United Kingdom QBall & Obsidian.

Many others games are planned like Wolf:ET, RTCW and Waržow.

Links: TTimo's blog - GtkRadiant official site - #radiant