liblo is a easy to use OSC (Open Sound Control) implementation written in C.
See the website for docs and example code.
Changes since last release:
OSC URL handling
better IPV6 support
better example code
support for all the types listed in the specification
automatic port number selection for servers
lo_target type has been deprecated, use lo_address now
some buffer overrun checks in lo_send()
This version is not binary compatible with the previous release.