xcb-demo: A collection of demo programs that use the XCB library.

dpms........: test of the dpms extension.
hypnomoire..: 
rendertest..: test of the render extension.
xcb-test....: test of the events on a window.
xcbrandr....: test of the randr extension.
xcbdpyinfo..: XCB port of the standard xdpyinfo.

In tests/ :

julia.......: example of XCBImage use, with a colormap.
lissajoux...: simple example of XCBImage use.