For us folks who like to stay Free and use the Blender 3d program over every other costly options!
Stained levels are created using opensource modelling tool "Blender"
Posted by realaxis on Oct 19th, 2012
The Stained team has released a video showing their level editing workflow. The game levels are designed in Blender (2.49!), and exported to Ogre3D. Stained is also going to have a level editor built in blender.
Here is video showing level design in stained using Blender.