Open Source C Networking Software for Mac

Dreamos is an operating system developed on Sega Dreamcast to be ported to an array of embedded devices. The goal of the project is to be able to run non-ported Unix programs on the Sega Dreamcast and other embedded devices with ease and POSIX compliance

KalliX is a multifunctional tool for gamers & people who'd like to manage their games, interact between games or in the games themself with other gamers. This project is (of course) OpenSource and based on the GPL license.

The OverServer is a "server for servers" - its purpose is to allow for coordination of player-hosted servers in one central location so that other players can easily locate games. The OverServer is an open-source tool for game developers who are working on network games and do not require a massively scalable backend for their network services but want a metaserver for their own games. One particular strength of the player-hosted games setup is that it places the burden of Internet traffic on the player base and not a central server. OverServer tries not to violate this strength by keeping the query and response length very low to cut down on overhead from running the metaserver. I designed OverServer with a few lessons in mind from Valve and Won's metaserver setup for Half-life. It is at least somewhat resistant to attack through a challenge-response system for incoming requests. I also wanted the tool to be very simple to "snap in" to an existing application.

XLattice is a communications infrastructure for server-assisted peer-to-peer networks. Initial implementation is Java (and so platform-independent) with C/C++ for Linux and then Windows to follow.