BtOgre21 is a fork of the btOgre library, distributed under the Zlib license.
It's goal is to have a clean an maintained verry thin layer to integrate Bullet physics into applications made with the newer versions of Ogre available now (2.1, and the future.)
The debug drawer has be rewroten to use an Hlms Unlit materiial, and to actually display the colors and additional informations Bullet can provide while debugging. (AABBs, Contact points, activation states, etc..)
BtOgre21 currently support creating collision shapes for the Ogre v1 and v2 objects.
Future developement plan to add support for Soft Bodies and to add a Motion State that will work in a multihreaded Ogre setup similar to what is found in the Ogre samples