A website that answers a single question: is website /foo/ down for everyone on the Net, or is it just you?
A collaborative website which maps wireless access points all across the world using information donated by enterprising wardrivers.
A web application that visualizes the structure of a mesh network running the Babel protocol. Requires node.js >=v0.4.0 and npm >=v1.0
An online point-and-click interface for DNS debugging using Dig.
A utility written in Python that monitors a wireless network to find the most active users and lets you mess with their connection. You can spy on them or inject arbitrary stuff into their web traffic. Can also be used as a jammer. Pretty heavy dependencies but nobody in their right mind would rewrite them all for a single utility. Supports credential harvesting and dns spoofing.
Deprecated. Read through this to get an idea of how things work.
How to build a 9600 bps modem for a Commodore that is actually a wifi NIC.
howto build a personal gsm cellular network using linux, a RasPi, and an SDR.
A utility which monitors routers by logging into them, pulling the config files, and comparing them against known-good files to see if anyone's been monkeying with them. Supports Cisco, Juniper, Foundry, Redback, ADC, MRT, Alteon, and HP gear, probably more.
Another how-to for getting the Juniper's Java-based VPN client working on Linux machines.