Cocoa Sockets

For one of the classes I'm taking right now (Computer Networks), I'm going to need to do some sockets programming. We are allowed to use pretty much any programming language and framework that we want, so of course I'm going to use Cocoa. What are the best libraries for socket programming in Cocoa? So far I've turned up SmallSockets , NetSocket , and AsyncSocket . So far I've played with SmallSockets a bit, but haven't had time to try out NetSocket and AsyncSocket. Has anyone these or other socket libraries for Cocoa? If so, any suggestions?