Site Recommendations
Last modified February 16, 2025.
Astronomy
- Daff Moon Phase is an Android app that I used to spot all five naked-eye planets (Mercury, Venus, Mars, Jupiter, and Saturn) in 2020.
- Sunrise and Sunset Calculator not only calculates sunrise and sunset times, but also calculates civil twilight, nautical twilight, astronomical twilight, and solar noon times as well!
Natural Languages
- Pleco is an amazing Chinese dictionary app that I recommend to anyone learning Mandarin.
Rubik’s Cubes and Geometry
- MagicCube4D provides some nice 4D twisty puzzles for whenever 3D twisty puzzles aren’t enough.
- Roice Nelson created several cubing applications such as this set of 5D Rubik’s cubes, a fully-functional 4D megaminx with 2520 cubies, and a massive collection of non-Euclidean puzzles. He then wrote a paper with Henry Segerman on visualizing hyperbolic honeycombs!
- 4D Euclidean Space dissects 4D shapes into layers so you can see how they’re constructed.
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