1 - Allegro 4.2.0 Allegro is a game programming library for C/C++ developers distributed freely, supporting the following platforms: DOS, Unix (Linux, FreeBSD, Irix, Solaris, Darwin), Windows, QNX, BeOS and MacOS X. Allegro project provides many functions for graphics, sounds, player input (keyboard, mouse and joystick) and timers. License: Shareware OS: Unix