Projects
Apps and physics simulations by Greenleaf.
The projects
Simulations in a Box ↗Weather in a Box
An atmospheric simulation with clouds, rain, and changing weather.
Planetary Collisions
in a Box
A simulation of gravity and collisions between planets.

Quick Commander
A lightweight, fast Commander-style file manager with a two-pane layout. You can type what you want to do in natural language. The app uses AI to interpret your request, then lets you check and confirm that it understood you correctly before carrying it out. For my own use, it has replaced the file managers I used before without leaving me missing anything.
Quick Calculator
A simple, fast and convenient text-based calculator with variables, mathematical functions, and unit and currency conversion.
About
I'm Thomas Grønneløv, the solo developer behind Greenleaf, with a background in computer science, physics simulation, and game development.
Some of the first programs I wrote when I was young were simulations, and that interest has stayed with me ever since. I'm especially interested in simulations you can interact with and see respond in real time. Making them run fast enough is part of what I enjoy.











