Wikileaks DDOS powered by open source tools?
According to SANS, one of the key tools being used as part of the Wikileaks driven DDOS attacks is something called JavaLOIC.
That tool is a port of the open source LOIC - Low Orbit Ion Canon - stress testing tool that is freely available in the Sourceforge open source project repository. No, the tool you can find on Sourceforge isn't the one specifically configured to help the DDOS against public sites.
What LOIC represents in its original open source state - is a legitimate tool for stress testing a web server. I've been using similar tools for years, including one called Siege , which I wrote about 6 years ago.