SSTCPKit is a project mainly written in ..., it's free.
OS X/iPhone Framework for sending data via TCP sockets and connect to services with Bonjour
This framework is basically a wrapper for easy setup and removal of boilerplate code for Bonjour and send data via sockets.
Only the most essential features are implemented and more error handling will come as well as an iPhone version.
Better way of adding framework to the examples.