Every mountain, building and tree shadow mapped for any date and time
Mediocre Engineer’s guide to HTTPS
Computing the day of the week for any given date
Drone Flying 101 — An Interactive Tutorial for Beginners
Try Clojure
suncalc.org — Computation path of the sun
immersive linear algebra
When Is a Counter-Strike Player Good?
Ellis' Print Tuning Guide
Camera Depth of Field Simulator