Coding Dojo : This page is intended as a list of Kata exercises that people have tried at their Dojo meetings, which links to more detailed descriptions of each Kat...
Stack Overflow : Stack Overflow is a question and answer site for professional and enthusiast programmers.
Denigma : Denigma explains code in conversational English.
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Inj3ct0r 1337day.com : Exploit database separated by exploit type (local, remote, DoS, Poc, etc.)