HttpWatch : An HTTP Viewer and HTTP Sniffer for IE and Firefox
Vaurien : Vaurien is basically a Chaos Monkey for your TCP connections. Vaurien acts as a proxy between your application and any backend.
You can use it in your...
OpenDNS : The safest, smartest, fastest and most reliable DNS on the planet.
BeEF : The Browser Exploitation Framework (BeEF) is a powerful professional security tool. BeEF is pioneering techniques that provide the experienced penetra...
Wireshark is the world's foremost network protocol analyzer. It lets you see what's happening on your network at a microscopic level. It is the de facto (and often de jure) standard across many industries and educational institutions.