Apps

Interactive applications and tools for various tasks.

Marbles

Marble-run contraption builder. Lay out ramps, spinners, and tunnels, wire switches to gates and lights, then save or share the scene.

Interactive physics simulation with sand, water, oil, fire, and more

Ambient artificial-life aquarium with three ecosystems: reaction-diffusion garden, evolving swarm broth, and tidal drift.

A living insect colony excavates chambers, carries every grain, survives disasters, and mutates its architecture.

Standard, Scientific, RPN, and Algebraic modes. Keyboard-driven, with a persistent mode preference.

Multiple-choice flashcards for common German vocabulary. Tracks stats locally.

Practice Bundesländer, capitals, and German/English state-name translations.

Playground for TypeSafe's Jev decision model: yes/no, choice, score, multi-question, semantic find, and quiz examples you can edit and send.