Simple
DirectMedia Layer (SDL) is a
cross-platform, free and open source multimedia library written in C that
presents a simple interface to various platforms' graphics, sound, and input
devices.
SDL
has the word "layer" in its title because it is actually a wrapper
around operating-system-specific functions. The main purpose of SDL is to
provide a common framework for accessing these functions. For further
functionality beyond this goal, many libraries have been created to work on top
of SDL.
Software
developers use it to write computer games or other multimedia applications that
can run on many operating systems including Android, AmigaOS, AmigaOS 4,
FreeBSD, BeOS/Haiku, iOS, Linux, Mac OS 9, Mac OS X, MorphOS,
OpenVMS,...