Using Socks4/5 or http proxies to make a multithreading Http-flood
A free and open source interactive HTTPS proxy
Utilize all available CPU cores for accepting new client connections
UFONet - Denial of Service Toolkit
Wapiti is a web-application vulnerability scanner
Framework for Man-In-The-Middle attacks
A protocol agnostic application layer denial of service attack.
NetStress is a DDoS and network stress testing tool.