FORSAN ET HAEC OLIM MEMINISSE JUVABIT
Our suggestions
Columns filled with numbers turned into images
ECMAScript (Javascript) library, distributed under the GPL license, that creates charts from (x)HTML tables.
The ridiculous got a temperature
Description of two popular weather units; their uselessness and absurdity demonstrated by way of mathematics.
Sunrise/sunset hours, all year long
GPL-distributed Python software that draws sunrise, sunset and daylight graphs.