There's a chemistry tree.
Looks like good fun, and the data that makes up the genealogy is shared under a CC-BY license (bulk data export requires contacting the site admin), but I have found no mention of the license for the code of the website/project.
Their FAQ is very informative.
OpenStreetMap
A list of apps and services built on OpenStreetMap
Two maps at the same scale (side-by-side maps) by Josh Horowitz via FlowingData
Near real-time visualisation of global weather conditions (see my note for background)
The Google Arts & Culture organisation has teamed up to create the digital platform Preserving Egypt’s Layered History with archaeologists at the American Research Centre in Cairo.
[The] new online platform aims to turn traditionally scholarly subject into something "easily digestible and fun to explore".
Allemansrätten är en unik möjlighet för oss alla att röra oss fritt i naturen. Men vi behöver också ta ansvar för natur och djurliv och visa hänsyn mot markägare och andra besökare.
Korta filmer om allemansrätten från Svenskt Friluftsliv
If you're ready for some archaeological adventure but find yourself pandemic-trapped at home and unable to make it to Egypt's ancient Valley of the Kings right now, try the virtual tomb tour of Pharaoh Ramses VI who reigned in the 12th century BC.
The tomb of Ramses VI is located in the Valley of the Kings, in Luxor, Egypt.
In a word, thrilling. When is the last time you heard someone describe Sudoku in that way?