character encodings for X11
predefined X11 atoms
cursor font glyph names and numbers
user click to choose window
off-screen window contents
drawing notifications
window off-screen double buffering
external screen saver support
images in SysV style shared memory
X11R2/R3 compatibility mode
colormap utilization policy extension
miscellaneous "fixes" extension
direct video memory access
multi-monitor display information
synthetic user input and more
server resource usage
object-oriented server grabbing
miscellaneous X11::Protocol helpers
window manager things for client programs
set root window background