VVOSC is an Objective-c framework for assembling, sending, and receiving OSC (Open Sound Control) messages on OS X.  A simple sample application which sends and receives OSC messages is also included.  Please see the wiki for installation/build instructions and documentation.

more information on OSC:
http://opensoundcontrol.org/

VVOSC is licensed under a Creative Commons Attribution-Noncommercial-Share Alike license:

http://creativecommons.org/licenses/by-nc-sa/3.0/us/

Permissions beyond the scope of this license may be available by contacting the author:

ray@vidvox.net