Graphics

2xsai - fast anti-aliasing to enlarge images
aastr - anti-aliased stretching and rotation routines for Allegro
AASTR2 - anti-aliased and scaled blits and rotations
AlDjVu - loads a .djvu file (lossy image compression format )
AllegroGL - opengl extensions for Allegro
AllegroPak - Ancient Allegro addon lib. Mostly adds Z-buffering to polygons and sprites. Also does 3D spheres.
drs - a dirty rectangle system for Allegro
ebox - a c++ collision detection class
fblend - a series of special routines that do color blending -fast-
framecap - Captures frames from webcam
OpenLayer - a hardware accelerated 2D Graphics library
pmask - collision detection
ppcol - collision detection

The resource directory is meant for any resources that could be helpful to an Allegro developer. You can add your own links or even suggest new categories. (Be sure to include the full URL, title, and description).