Recently stumbled onto this crazy program;
WWW Link and I love it.
Basically, you feed it a texture, and it will create Normal, Displacement, Occlusion, Specularity, and Diffuse.
And it's extremely easy to do; it even includes a simple model with your texture included on it. While sins uses only bump and spec (?? Correct me, I'm wrong) this makes it pretty fun to do so.
You can even load custom models into the model previewer. I really, really recommend it. Here's a small review of it;
WWW Link
