Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Springtomize - Tear down the walls
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
Winterboard - Give your iPhone or iPod Touch a graphical overhaul!
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.