Language:
C++	codeguru, cplusplus, Bjarne Stroustrup's homepage, the GUI toolkit, NCBI C++ Toolkit, Connector/C++, FLTK, C/C++ User Journal, libsquence, Visual C++ MSDN,
Linux	Linux From Scratch, Ubuntu, vBird,
Apache
MySQL	MySQLsyntax, SQL,
PHP	Manual,
Perl	Docs,
R	Docs,
Color	Canva, coloreminder, ZeroTo255,
API:
Ruby	coreAPI, StandarLib, ROR, BioRuby, ChemRuby, RMagick, Cairo, ,
Python	PythonGossip, C/API, Chimera,