Gymnasium in josephmisiti/awesome-machine-learning, krzjoa/awesome-python-data-science
An API standard for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)
created at Sept. 8, 2022, 1:58 a.m.
HighwayEnv in Ly0n/awesome-robotic-tooling
A minimalist environment for decision-making in autonomous driving
created at Nov. 15, 2017, 3:38 p.m.
PettingZoo in krzjoa/awesome-python-data-science
An API standard for multi-agent reinforcement learning environments, with popular reference environments and related utilities
created at Jan. 20, 2020, 3:41 a.m.
ViZDoom in josephmisiti/awesome-machine-learning, leomaurodesenv/game-datasets
Reinforcement Learning environments based on the 1993 game Doom 
created at June 26, 2015, 6:38 p.m.
Metaworld in josephmisiti/awesome-machine-learning
Collections of robotics environments geared towards benchmarking multi-task and meta reinforcement learning
created at Sept. 9, 2019, 7 p.m.
MicroRTS in leomaurodesenv/game-datasets
A simple and highly efficient RTS-game-inspired environment for reinforcement learning
created at March 12, 2015, 6:16 p.m.
MAgent2 in krzjoa/awesome-python-data-science
An engine for high performance multi-agent environments with very large numbers of agents, along with a set of reference environments
created at Sept. 5, 2022, 4:29 p.m.
Shimmy in krzjoa/awesome-python-data-science
An API conversion tool for popular external reinforcement learning environments
created at Oct. 6, 2022, 9:24 p.m.