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A programming puzzle game. Write JavaScript to control a building elevators and transport passengers as efficiently as possible.

by magwo

Learn how Git really works — visually. Build real Git commands by tapping (no typing) and watch a live commit graph branch, merge, and rebase in real time. A guided 17-lesson curriculum takes you from your first commit to untangling diverged branches, plus Practice, Sandbox, and a Daily puzzle.

by Mercutio

Test your knowledge of JavaScript's tricky == operator. Fill in the equality table by guessing which comparisons return true — a fun challenge for developers.

by slikts

Define states, symbols, and transitions, then watch a Turing machine execute step by step.

by VittGam

A live-coding music sequencer where every letter of the alphabet is an operator. Route signals through a 2D grid to generate sound.

by Hundred Rabbits

A live GLSL fragment shader editor with instant preview. Write WebGL shaders and see the results in real-time on a canvas.

by patriciogonzalezvivo

A browser drum machine and beat sequencer. Program grooves, record patterns, and export your beats as JSON.

by pemmyz

A browser-based paint app inspired by MS Paint. Draw with various tools, pick colors, adjust brush sizes, and export your artwork as JPEG.

by mdjamilkashemporosh

An open-source puzzle game editor and engine. Design, build, and play tile-based puzzle games right in the browser.

by increpare

Artificial life simulation where simple attraction and repulsion rules between particles produce complex emergent behavior.

by Launch Arcade

An interactive JavaScript console. Type JavaScript, see results instantly. Perfect for experimenting and learning.

by openexchangerates

Interactive visualizations of 40+ data structures and algorithms — trees, heaps, graphs, hash tables, sorting, and more. A classic CS education resource.

by dgalles

A collection of interactive JavaScript projects showcasing DOM manipulation, game logic, and core programming concepts. Features number guessing games, modal components, banking apps, and more educational demos.

by rahulgotrekiya

A tiny, elegant code editor for the browser with syntax highlighting. Write and edit code in a clean, minimal interface.

by kazzkiq

Play Top Trumps against the computer — compare card stats, pick your best attribute, and try to win the whole deck in this classic card game.

by FabianaCampanari