About tool:
Climate-history visualisation site providing per-day, per-location averages and percentiles. Quick check for whether observed weather is plausible.
Bellingcat-developed open-source web tool that constrains the geographic regions where a photographed shadow could have been cast at a given local time.
Free open-source planetarium. Reproduces the night sky for any date, time and location — essential for verifying star, moon and constellation positions in imagery.