XFree86: www.xfree86.org

X 协议: www.x.org/X11_protocol.html

Libiconv: www.gnu.org/software/libiconv

Xlibs: www.freedesktop.org/Software/xlibs

Xserver: freedesktop.org/Software/xserver

Cairo: www.cairographics.org

Glitz: www.freedesktop.org/Software/glitz

D-BUS: www.freedesktop.org/Software/dbus

Draining the Swamp: www.linux.org.uk/~telsa/Trips/Talks/g3-swamp.html