Liblo, the Lite OSC library, is an implementation of the Open Sound
Control [1] protocol for POSIX systems. It is written in ANSI C and
released under the GNU General Public Licence. It is designed to make
developing OSC applictions as easy as possible.
http://plugin.org.uk/liblo/
Changes:
        Patch from Dave Robillard that fixes bundles of more than 4 messages.
        Some const char * for C++ compatibility.
        Added a source field to messages that represents the source from
                which a message was received. Useful in method handlers to
                determine which client sent the message.
        Added patch from Walco van Loon and Pix that fixes a bug in the
                hostname detection fallback code
- Steve
[1] 
http://www.cnmat.berkeley.edu/OpenSoundControl/