A family tree of electronic music genres with detailed explanations and samples.

A realtime map of airplanes flying all over the world.

A realtime map of trains running in France.

3D drawings of thousands of metro stations from different European cities.

Detailed maps of urban transports.

Attempt to gather open-source or source-available remakes of great old games in one place.

Attempt to list all of the popular (and perhaps not so popular) juggling tricks in one organized place.

Photos from inside music instruments.

Video overview of all the processes used to make a microchip, as well as an overview of a microchip factory.

What happens when you run a program on your computer (multiprocessing, system calls, memory management, hardware interrupts…).

Everything about email.

Interactive introduction to SVG paths, including lines, curves (Bezier, quadratic, cubic) and arcs.

How sound works, from particles, to pressure, to waveforms, to Fourier transform.

Free textbooks about biology, chemistry, math, physics, social sciences…

How mechanical watches work.

Animated visualizations of algorithms (sampling, shuffling, sorting and maze generation).

Animated visualizations of data structures and algorithms.

A guide on placing key modifiers (ctrl, alt, shift…) on the keyboard home row, using QMK and Kmonad.

507 different mechanical movements in pictures, some with animations.

Detailed information about Bluetooth audio profiles (A2DP, HSP), codecs (CVSD, SBC, mSBC, aptX, aptX HD, LDAC…), software (BlueZ…) and devices.