For a long time I've been interested in many-body / N-body / molecular dynamics physics. Along the way, I've been writing code to use the techniques I've read about. At the time of its inception, I was learning about neighbor lists, and quadtrees, so it was natural that I called the code, 'entbody'. 'Ent' comes from the tree people in LOTR, so, it's got that going for it, which is nice.
entbody is now the generic name for the code which I split off into various projects as I go. It can run on multicore CPU as well as NVIDIA GPUs and is best at short range forces. On a Geforce Titan, it can simulate roughly one million interacting particles at 30 fps, fast enough to interact with it through the keyboard.
A stripped down version for GPU can be found on my github,