BanglaDos

An open source network stress testing and denial-of-service attack application, initially developed by Samin Yasar. The idea behind BanglaDos is that it can allow you to participate in attacks even if you've no clue how to hack. It send thousand of garbage request to web servers like visa.com , paypal.com to shut them down.
If many computers using BanglaDos pointed at a single site to make a real impact, letting a central administrator press the big button of website destruction makes the whole network more effective. And last but not the least, no one can detect you.

DISCLAIMER: USE ON YOUR OWN RISK. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER OR CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE.