Why not add some more:
Cross platform Open source 3D (Game) Engine with OpenGL, Direct3D and even Blender support:
OGRE2D/3D Java, C, C++, Win32, OpenGL, DirectX tutorials
GametuTorials.comFlipCode is dead, but their
archive is still available, most of the members migrated to
DevMaster.net - massive amount of tutorials at both places on OpenGL, C++, etc...
Ultimate Game Programming with: C++, C#, Java, VB.NET, OpenGL, DX9, DX10, Game Engine tutorials.
Nate Robins OpenGL tutorials and demos.
And
iDevGames for the Mac - I doesn't really know this one, but it is something big.
This might be useful, too: a Java OpenGL / OpenAL wrapper
lwjgl.
Tao and
CsGL are C# wrappers for OpenGL, CsGL is not developed anymore, so Tao is the way to go - however its a bit pervert to use OpenGL in C# imho

A quick glimps at the embedded things: OpenGL ES (GLES)
the specifications and an open source
library (Vincent), or a bit more specific one: any Symbian OS 8.0+ SDK
here or from
Nokia, and probably many more...
Physics:
- ODF -
Open Dynamics Framework-
PhysX (formerly Novodex) by Ageia, if you are planning for hardware acceleration
And something fun:
Indie Game Jam - really good ideas, mostly with proof of concept demos and even with source codes - but respect the copyrights please.