maim (make image) takes screenshots of your desktop. It has options to take only a region, and relies on slop to query for regions. maim is supposed to be an improved scrot.

slop (Select Operation) is an application that queries for a selection from the user and prints the region to stdout.

openFrameworks addon for warping mesh with mouse/keyboard

A set of classes to help route and parse OSC message in programs with tree-like structures.

(maintained) an oscpack-inspired C++ wrapper for the liblo OSC library