Having used PhysX for so long I wanted to spread my wings and take a look at the littler physics engines out there. But why stop at one physics engine? Why not a whole bunch of them? Wouldn’t it be awesome to have a set of classes setup which abstractificate the various elements of a [...]

I wrote the matrix class a while ago, it really simplifies a lot of the generic coding you’d have to otherwise do to convert the matrix classes between PhysX and DirectX.
The basic idea is to inherit from the PhysX matrix/vector classes (NxMat34/NxVec3) and add a few constructors and overloaded operators to make it play nice [...]

Just uploaded a DirectX/PhysX library, currently the best feature it has is a function which takes in an ID3DXMesh* pointer and converts it into an NxActor. Be sure to contact and tell me if you find any bugs or flaws in the code or just have suggestions.
Get it here.