Euclid's Elements
Construct Euclid's propositions step by step in interactive geometry levels.
Constellation Quiz
Test yourself on the constellations with circular and rectangular star maps.
Random Sprite Generator
Generate random pixel sprites with adjustable size, colors, and filters.
Video Volume Surface
Turn an uploaded video into a 3D volume you can explore.
Demochessy
Chess played by everyone: visitors vote, and the most popular move wins.
Anonymous Grade Average
Start a poll to share scores anonymously and see the grade distribution.