If you are following security trends then you've probably heard about the DoS attack against major number of Apache versions by usage of specially crafted Range header (CVE-2011-3192). Based on the original PoC (here) I've made a Python version out of it which is more user friendly and has few program workflow enhancements, like (safe) automatic usage of maximum (system) allowed thread number. So, it's nothing new. It's only properly (re)written to suit own personal taste and from my point of view it works better than original.

p.s. Python v2.5.x-v2.7.x is recommended for running this tool