Simulation GitHub Repositories (2026) · Open Source Tools

Agent Skills for NVIDIA products — install into Claude Code, Codex, and other coding agents to run Physical AI, robotics, simulation, CUDA, and RAG workflows end to end.

Learn autonomous driving by building it: Python simulations and an open textbook where the system grows one stage at a time. Swap and compare localization, planning and control algorithms in the same system.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

A free cartoon browser game about how the internet really works: lay fiber and subsea cables, peer at IXPs, bill on the 95th percentile and survive backhoes, sharks and route leaks on your way to Tier 1.

Fast and flexible physics-based battery models in Python

Open-source, end-to-end platform for evaluating, observing, and improving LLM and AI agent applications. Tracing · Evals · Simulations · Datasets · Gateway · Guardrails. Self-hostable. Apache 2.0.

A Python library for running thousands of MuJoCo simulations in parallel on CPU

Real-time multi-physics simulation with an emphasis on medical simulation.

The General Mission Analysis Tool (GMAT) is the world's leading enterprise, multi-mission, open source software system for space mission design, optimization, and navigation. The system supports missions in flight regimes ranging from low Earth orbit to lunar, libration point, and deep space missions. NOTE: Non-release tagged commits are AS IS.

High-performance C++ library for multiphysics and multibody dynamics simulations

A C++ library for simulating Rocket League games at maximum efficiency

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West and Death Stranding 2.

Python Toolkit for Causal and Probabilistic Reasoning

Benchmarking Coding Agents for Interactive World Modeling from Embodied Videos - Rethinking Embodied Real2Sim from a Software Engineering Perspective

Eclipse SUMO is an open source, highly portable, microscopic and continuous traffic simulation package designed to handle large networks. It allows for intermodal simulation including pedestrians and comes with a large set of tools for scenario creation.

Multiphysics Object Oriented Simulation Environment: A robust, modern, extendable, finite element/finite volume framework that excels at creating complex multiphysics simulations.

The official repository for the gem5 computer-system architecture simulator.

ROS2 control package for Mujoco simulation physics simulator, including plugins for various sensors, RGB-D cameras, and lidar.

A coupling library and ecosystem for partitioned multi-physics and multi-scale simulations, including surface and volume coupling.

Open source robotics simulator. The latest version of Gazebo.