"You may be familiar with Blender 3D, the open source modeling,
animation, rendering, and post-production package from the Blender
Foundation. If you have used Blender for longer than a few weeks
and miss some aspects of the old pre-2.3 user interface, or if you
are looking for some interesting features to improve your 3D
experience, you should get to know instinctive-blender, a fork
created by the small German company instinctive mediaworks.
"The degree of efficiency of Blender's user interface decreased
markedly with the UI overhaul in Blender 2.30 in 2003.
instinctive-blender's main purpose is to bring some of the
efficiency of the old interface back..."