These are test programs for the SDL library:
testver Check the version and dynamic loading and endianness
testtypes Check to see if the data types are the correct size
testhread Hacked up test of multi-threading
testlock Hacked up test of multi-threading and locking
testerror Tests multi-threaded error handling
testsem Tests SDL's semaphore implementation
testtimer Test the timer facilities
loopwave Audio test -- loop playing a WAV file
testcdrom Sample audio CD control program
testkeys List the available keyboard keys
testvidinfo Show the pixel format of the display and perfom the benchmark
checkkeys Watch the key events to check the keyboard
testwin Display a BMP image at various depths
graywin Display a gray gradient and center mouse on spacebar
testsprite Example of fast sprite movement on the screen
testbitmap Test displaying 1-bit bitmaps
testalpha Display an alpha faded icon -- paint with mouse
testwm Test window manager -- title, icon, events
threadwin Test multi-threaded event handling
testgl A very simple example of using OpenGL with SDL
testjoystick List joysticks and watch joystick events
testoverlay Tests the software/hardware overlay functionality.
testoverlay2 Tests the overlay flickering/scaling during playback.
testblitspeed Tests performance of SDL's blitters and converters.