The selected object's rotation pivot is moved to the bottom of its bounding box. The objects are then translated in Y to the ground plane. Select the objects to be moved to the ground plane, then run the script.

Slice multiple objects into separate pieces of geometry using another piece of geometry to determine how it is cut and the inside edge flow. Select your cutting geometry (preferably a plane) proceeded by the geometry that is to be cut up, then run the script.

Takes an animated object and duplicates it every frame. Each object's visibility is keyed for a visibility switch. I used this after converting my nparticles to a mesh, which allowed me to watch the animation in real time and tweak problems.