"Political freedom is a society's safety valve, allowing the passionately critical a nonviolent way to express their dissatisfaction with the status quo." --David Cole
The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Java, and Ada, as well as libraries for these languages (libstdc++, libgcj,...).
Metasploit is an open-source exploit framework written for unix with mainly windows exploits. Nice tool to write and test your own + exploit into any pc/site with existing payloads. Also comes with online ROR version.
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