QUIDQUID DELIRANT REGES, PLECTUNTUR ACHIVI
Our suggestions
Sunrise and sunset, all year long, anywhere
Graphs of sunrise/sunset and time of light for any place in the world.
Our daily discussions
Archives of general (ptafflist) to free software (ptaffgnu) mailing list discussions by people near to ptaff.ca.
“Volumes of air” project
Estimation of the air volume consumed by human activities.