Programming Links
Allegro.cc - A game developing community network. The best site for programming games in C and C++. It has a great forum, as well as indie games and other applications. Also the place to get the Allegro library for developing and playing games with Allegro.
AllegroGL - The official site to get the AllegroGL library, source code and documentation.
Pixelate Magazine - Alternate Link - Pixelate is an online programming magazine primarly focused towards Allegro. The magazines have a lot of good tutorials covering a bunch of different topics. Some useful articles for learning AllegroGL can be found in Articles 6, 7, and 10.
Nehe Productions - A great site for tutorials on OpenGL, whether you are a beginner or an expert.
Friend's Sites
Tone's Hysteria - A crazy site by Tony!