A working list of resources I like. This is not an end-all list of resources, they're simply sites I use.
Version Control
Git DVCS
Official Git Doc Page"
GitHub
Pro-Git (Book)
C++
Eclipse C/C++ Development Tools (CDT)
C++ Documentation (cplusplus.com)
gtkmm - C++ Interface to GTK+
Qt Developer Zone
Qt 4.6 API Doc
Python
Python.org
Dive Into Python
O'Reilly Python Center
PyGTK
Java
Java Platform SE 6 API Reference (java.sun.com)
Fedora Project