Trixd00r - TCP/IP based backdoor
It consists of a server and a client. The server sits and waits for magic packets using a sniffer. If a magic packet arrives, it will bind a shell over TCP or UDP on the given port or connecting back to the client again over TCP or UDP.

Download
http://www.nullsecurity.net/tools/trixd00r-0.0.1.tar.gz