Thomas Adam#xtt (XTimeTable) is an application written by Matt Chapman (of www.xwinman.org fame).
It's a simple application written in #x11 (using #libxpm) to display recurring events throughout the working week -- which in this case is a static timetable of university lectures.
The entries shown can be colour-coded (via X11 colour names - which would have been in rgb.txt).
The day's schedule is assumed to be static -- that is, one entry per hour, and a working day of 09:05 - 17:05 -- hence there can only ever be 9 entries per day at most.
I really like this application as it shows just how versatile this application could be - as well as it not being over-engineered to use #electron, which is precisely what many people writing something like this now would use.
Fools!