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Farama-Foundation
gymnasium

An API standard for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)

6.2M 12K 1K
DLR-RM
stable-baselines3

PyTorch version of Stable Baselines, reliable implementations of reinforcement learning algorithms.

1.2M 13K 2K
Farama-Foundation
pettingzoo

An API standard for multi-agent reinforcement learning environments, with popular reference environments and related utilities

338K 3K 484
Stable-Baselines-Team
sb3-contrib

Contrib package for Stable-Baselines3 - Experimental reinforcement learning (RL) code

301K 712 240
open-thought
reasoning-gym

[NeurIPS 2025 Spotlight] Reasoning Environments for Reinforcement Learning with Verifiable Rewards

182K 1K 118
Toni-SM
skrl

Modular Reinforcement Learning (RL) library (implemented in PyTorch, JAX, and NVIDIA Warp) with support for Gymnasium/Gym, NVIDIA Isaac Lab, MuJoCo Playground and other environments

73K 1K 141
Farama-Foundation
minigrid

Simple and easily configurable grid world environments for reinforcement learning

64K 2K 641
sail-sg
envpool

C++-based high-performance parallel environment execution engine (vectorized env) for general RL environments.

16K 1K 133
Farama-Foundation
mo-gymnasium

Multi-objective Gymnasium environments for reinforcement learning

13K 380 53
Farama-Foundation
gym-minigrid

Simple and easily configurable grid world environments for reinforcement learning

13K 2K 641
axon-rl
gem-llm

A Gym for Agentic LLMs

6K 478 32
DLR-RM
rl-zoo3

A training framework for Stable Baselines3 reinforcement learning agents, with hyperparameter optimization and pre-trained agents included.

6K 3K 595
opendilab
lightzero

[NeurIPS 2023 Spotlight] LightZero: A Unified Benchmark for Monte Carlo Tree Search in General Sequential Decision Scenarios (awesome MCTS)

4K 2K 190
hill-a
stable-baselines

A fork of OpenAI Baselines, implementations of reinforcement learning algorithms

4K 4K 726
proroklab
vmas

VMAS is a vectorized differentiable simulator designed for efficient Multi-Agent Reinforcement Learning benchmarking. It is comprised of a vectorized 2D physics engine written in PyTorch and a set of challenging multi-robot scenarios. Additional scenarios can be implemented through a simple and modular interface.

4K 563 107
robotology
gym-ignition

A toolkit for developing OpenAI Gym environments simulated with Ignition Gazebo.

3K 251 27
robotology
scenario

Framework for developing OpenAI Gym robotics environments simulated with Ignition Gazebo

3K 251 27
LucasAlegre
sumo-rl

Reinforcement Learning environments for Traffic Signal Control with SUMO. Compatible with Gymnasium, PettingZoo, and popular RL libraries.

3K 1K 259
mpSchrader
gym-sokoban

Sokoban environment for OpenAI Gym

2K 398 90
marella
train

A library to build and train reinforcement learning agents in OpenAI Gym environments.

2K 1 0
ClementPerroud
gym-trading-env

A simple, easy, customizable Open IA Gym environments for trading.

2K 490 104
EMI-Group
evox

Distributed GPU-Accelerated Framework for Evolutionary Computation. Comprehensive Library of Evolutionary Algorithms & Benchmark Problems.

2K 2K 322
pyrddlgym-project
pyrddlgym

A toolkit for auto-generation of OpenAI Gym environments from RDDL description files.

2K 93 23
RatInABox-Lab
ratinabox

A python package for simulating movement and spatial cell types (e.g. place cells, grid cells) in continuous environments.

2K 255 52
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