Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
OpenWiFiSpots - Hotspot location app
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
Wi-Fi Space - Hotspot location app
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.
pttrns - iPhone and iPad user interface patterns