1. cURL.,
http://curl.haxx.se/
2. Ethereal,
http://www.ethereal.com
3. Google bombing,
http://en.wikipedia.org/wiki/Google_bomb
4. Inaccessibility of CAPTCHA, Alternatives to Visual Turing Tests on the Web,
http://www.w3.org/TR/turingtest/
5. JCavaJ Java Decompiler,
http://www.bysoft.se/sureshot/jcavaj/index.html