* [gcsim v2.48.0](https://github.com/genshinsim/gcsim) – Monte Carlo combat simulator modeling Genshin Impact actions, damage, reactions, and DPS distributions.

* [rp2040js v1.4.0](https://github.com/wokwi/rp2040js) – Raspberry Pi Pico Emulator for the Wokwi Simulation Platform that supports Arduino code and MicroPython.

* [OSRD v1.3.0](https://github.com/OpenRailAssociation/osrd) – Web application for railway infrastructure design, capacity analysis, timetabling and simulation.

* [force-graph v1.51.5](https://github.com/vasturiano/force-graph) – Force-directed graph renderer on HTML5 canvas with d3-force physics, zoom/pan, dragging, and interaction support.

* [PathView v0.18.0](https://github.com/pathsim/pathview) – Web-based visual node editor for building and simulating dynamic systems using in-browser Python via Pyodide with optional Flask backend.

* [Simulacrum @simulacrum/server-v...](https://github.com/thefrontside/simulacrum) – Simulation platform that enables high-fidelity application previews and decouples development from external service dependencies.