X-tlk - A very simple X11 toolkit using a row/column layout
X-motd - A small full screen X11 motd displayer. Useful in xsession startup scripts
X-readline - Small utility routines for line oriented input/output using full screen X11
X-host - A xhost replacement disallowing the famous 'xhost +'
X-fontperf - A small utility to measure font rendering/loading time in an X11 environment