Homepage: http://aeruder.gnustep.us/netclasses/index.html.

Netclasses is a portable socket classes. GNUstep doesn't come with a socket class even though you can connect a native socket to NSFileHandle for network. GNUstep has additional methods in NSFileHandle to access network. Netclasses is another choice, especially good for server or client which keeps communicating with server, for example, instant messengers. It supports both blocking and non-blocking network access.

Netclasses comes with good documentation and examples, and is used by TalkSoup, a GNUstep IRC client.