OWASP : The Open Web Application Security Project (OWASP) is a worldwide not-for-profit charitable organization focused on improving the security of software.
SQL Injection Cheat Sheet : Samples are provided to allow reader to get basic idea of a potential SQL Injection attack and almost every section includes a brief information about...
SitePoint : SitePoint provides cutting-edge content for web professionals — developers, designers, programmers, freelancers and site owners.
The Joel Test : I've come up with my own, highly irresponsible, sloppy test to rate the quality of a software team : 12 Steps to Better Code.
Sometimes bugs have symptoms beyond belief. This is a collection of such stories from around the web.