1.jrouwe / JoltPhysics
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.
+500 stars
from 11,610 · score 6.22
Trending repositories
Ranked by Attention Score: stars gained over the last 30 complete days
51 repositories by Attention Score · Oct 4, 2026 – Nov 2, 2026 (UTC)
2.OpenRCT2 / OpenRCT2
An open source re-implementation of RollerCoaster Tycoon 2 🎢
+269 stars
from 16,261 · score 5.60
3.future-agi / future-agi
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.
+139 stars
from 2,098 · score 4.94
4.OpenTTD / OpenTTD
OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe
+123 stars
from 8,324 · score 4.82
5.PavelDoGreat / WebGL-Fluid-Simulation
Play with fluids in your browser (works even on mobile)
+114 stars
from 16,673 · score 4.74
6.Revolutionary-Games / Thrive
The main repository for the development of the evolution game Thrive.
+84 stars
from 3,724 · score 4.44
7.bulletphysics / bullet3
Bullet Physics SDK: real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.
+82 stars
from 14,758 · score 4.42
8.projectchrono / chrono
High-performance C++ library for multiphysics and multibody dynamics simulations
+70 stars
from 3,064 · score 4.26
9.mesa / mesa
Mesa is an open-source Python library for agent-based modeling, ideal for simulating complex systems and exploring emergent behaviors.
+65 stars
from 3,868 · score 4.19
10.taojy123 / KeymouseGo
类似按键精灵的鼠标键盘录制和自动化操作 模拟点击和键入 | automate mouse clicks and keyboard input
+63 stars
from 10,582 · score 4.16
11.eclipse-sumo / sumo
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.
+63 stars
from 4,190 · score 4.16
12.cyberbotics / webots
Webots Robot Simulator
+59 stars
from 4,684 · score 4.09
13.synthetichealth / synthea
Synthetic Patient Population Simulator
+58 stars
from 3,371 · score 4.08
14.The-Powder-Toy / The-Powder-Toy
Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well as heat.
+53 stars
from 5,337 · score 3.99
15.openrocket / openrocket
Model-rocketry aerodynamics and trajectory simulation software
+52 stars
from 3,136 · score 3.97
16.lammps / lammps
Public development project of the LAMMPS MD software package
+42 stars
from 3,077 · score 3.76
17.Schlaubischlump / LocationSimulator
MacOS application to spoof / fake / mock your iOS / iPadOS or iPhoneSimulator device location. WatchOS and TvOS are partially supported.
+35 stars
from 3,132 · score 3.58
18.jslee02 / awesome-robotics-libraries
:sunglasses: A curated list of robotics libraries and software
+35 stars
from 3,065 · score 3.58
19.idaholab / moose
Multiphysics Object Oriented Simulation Environment: A robust, modern, extendable, finite element/finite volume framework that excels at creating complex multiphysics simulations.
+31 stars
from 2,368 · score 3.47
20.sofa-framework / sofa
Real-time multi-physics simulation with an emphasis on medical simulation.
+30 stars
from 1,265 · score 3.43
21.quantumlib / Cirq
Python framework for creating, editing, and running Noisy Intermediate-Scale Quantum (NISQ) circuits.
+29 stars
from 5,071 · score 3.40
22.Unity-Technologies / Unity-Robotics-Hub
Central repository for tools, tutorials, resources, and documentation for robotics simulation in Unity.
+21 stars
from 2,585 · score 3.09
23.ahundt / awesome-robotics
A curated list of awesome links and software libraries that are useful for robots.
+20 stars
from 1,499 · score 3.04
24.pgmpy / pgmpy
Python Toolkit for Causal and Probabilistic Reasoning
+19 stars
from 3,346 · score 3.00
25.pioneerspacesim / pioneer
A game of lonely space adventure
+17 stars
from 1,912 · score 2.89
26.pathsim / pathsim
A Python native dynamical system simulation framework in the block diagram paradigm.
+15 stars
from 497 · score 2.77
27.R74nCom / sandboxels
In-browser falling-sand simulation game with over 500 elements and thousands of reactions.
+15 stars
from 462 · score 2.77
28.precice / precice
A coupling library and ecosystem for partitioned multi-physics and multi-scale simulations, including surface and volume coupling.
+13 stars
from 974 · score 2.64
29.MFlowCode / MFC
Exascale multiphase flow solver — 2025 Gordon Bell Prize Finalist | 200T grid points on 43K+ GPUs
+13 stars
from 425 · score 2.64
30.jasonwebb / morphogenesis-resources
Resources on the topic of digital morphogenesis (creating form with code). Includes links to major articles, code repos, creative projects, books, software, and more.
+11 stars
from 2,288 · score 2.48
31.osrf / gazebo_models
Gazebo database of SDF models. This is a predecessor to https://app.gazebosim.org
+11 stars
from 1,324 · score 2.48
32.lmmentel / awesome-python-chemistry
A curated list of Python packages related to chemistry
+10 stars
from 1,441 · score 2.40
33.unknown-horizons / unknown-horizons
Unknown Horizons official code repository
+8 stars
from 1,551 · score 2.20
34.ucla-mobility / OpenCDA
A generalized framework for prototyping full-stack cooperative driving automation applications under CARLA+SUMO.
+8 stars
from 1,163 · score 2.20
35.TUDelft-CNS-ATM / bluesky
The open source air traffic simulator
+7 stars
from 568 · score 2.08
36.uuvsimulator / uuv_simulatorArchived
Gazebo/ROS packages for underwater robotics simulation
+5 stars
from 884 · score 1.79
37.mithi / hexapod
Blazing fast hexapod robot simulator for the web.
+5 stars
from 794 · score 1.79
38.usnistgov / fipy
FiPy is a Finite Volume PDE solver written in Python
+5 stars
from 640 · score 1.79
39.fofapro / fapro
Fake Protocol Server
+4 stars
from 1,612 · score 1.61
40.unknown-horizons / godot-port
Unknown Horizons Godot Engine Port
+4 stars
from 907 · score 1.61
41.uber-common / metta
An information security preparedness tool to do adversarial simulation.
+3 stars
from 1,145 · score 1.39
42.MmgTools / mmg
open source software for bidimensional and tridimensional remeshing
+3 stars
from 488 · score 1.39
43.mlange-42 / ark
Ark -- Archetype-based Entity Component System (ECS) for Go.
+3 stars
from 302 · score 1.39
44.d-wasserman / Complete_Street_Rule
The Complete Street Rule for ArcGIS CityEngine is a scenario oriented design tool intended to enable users to quickly create procedurally generated multimodal streets.
+3 stars
from 215 · score 1.39
45.libMesh / libmesh
libMesh github repository
+2 stars
from 759 · score 1.10
46.johnmcfarlane / cnl
A Compositional Numeric Library for C++
+2 stars
from 693 · score 1.10
47.stuntrally / stuntrally
NOTE: development in stuntrally3 repo. 3D racing game based on VDrift and OGRE with own Track Editor. The main repository with Stunt Rally 2.x sources and data.
+2 stars
from 645 · score 1.10
48.ECSIM / opem
OPEM (Open Source PEM Fuel Cell Simulation Tool)
+2 stars
from 232 · score 1.10
49.h2non / toxyArchived
Hackable HTTP proxy for resiliency testing and simulated network conditions
+1 stars
from 2,711 · score 0.69
50.pydy / pydy
Multibody dynamics tool kit.
+1 stars
from 416 · score 0.69
51.sebsjames / mathplot
C++ modules for plotting, graphing and data visualization
+1 stars
from 66 · score 0.69