The Dubious Engine is just something new I'm playing with. It's an attempt to fix all of the things that bother me about the REngine. I've decided to start with the Physics library, as that's the part I find most interesting. This version supports a much fuller Rigid Body Physics simulator then what you'll find in the REngine. It implements collision detection by the method of separating axes. I've included a little physics test program which just drops 125 boxes on a table and lets them fight it out. The video of it is playing below.
You can get your copy of the Dubious Engine here. I'm releasing it under the ISC License, which basically says do what you want with it. As always I'm interested for any feedback, so feel free to get in touch at james -at- dubiousoft -dot- com.