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Some simulation platforms that caught my eye this year 
ThreeDWorld: A Platform for Interactive Multi-Modal Physical Simulation
https://arxiv.org/abs/2007.04954
http://www.threedworld.org/
https://arxiv.org/abs/2007.04954
http://www.threedworld.org/
SAPIEN: A SimulAted Part-based Interactive ENvironment
https://arxiv.org/abs/2003.08515
https://sapien.ucsd.edu
https://arxiv.org/abs/2003.08515
https://sapien.ucsd.edu
TartanAir: A Dataset to Push the Limits of Visual SLAM
https://arxiv.org/abs/2003.14338
http://theairlab.org/tartanair-dataset/
https://arxiv.org/abs/2003.14338
http://theairlab.org/tartanair-dataset/
Interactive Gibson: A Benchmark for Interactive Navigation in Cluttered Environments
https://arxiv.org/abs/1910.14442
https://arxiv.org/abs/1910.14442
AllenAct: A Framework for Embodied AI Research
https://arxiv.org/abs/2008.12760 https://allenact.org/
https://arxiv.org/abs/2008.12760 https://allenact.org/
robosuite: A Modular Simulation Framework and Benchmark for Robot Learning
https://arxiv.org/abs/2009.12293
https://arxiv.org/abs/2009.12293
NeuralSim: Augmenting Differentiable Simulators with Neural Networks
https://arxiv.org/abs/2011.04217
https://arxiv.org/abs/2011.04217
SoftGym: Benchmarking Deep Reinforcement Learning for Deformable Object Manipulation
https://sites.google.com/view/softgym/
https://sites.google.com/view/softgym/
Eldersim: A Synthetic Data Generation Platform For Human Action Recognition In Eldercare Applications
https://arxiv.org/abs/2010.14742
https://arxiv.org/abs/2010.14742
Meta-World: A Benchmark and Evaluation for Multi-Task and Meta Reinforcement Learning
https://meta-world.github.io/
https://meta-world.github.io/
The NetHack Learning Environment
https://arxiv.org/abs/2006.13760
https://github.com/facebookresearch/nle
https://arxiv.org/abs/2006.13760
https://github.com/facebookresearch/nle
Learning Robust Control Policies for End-to-End Autonomous Driving From Data-Driven Simulation
http://www.mit.edu/~amini/vista/
http://www.mit.edu/~amini/vista/
SoundSpaces: Audio-Visual Navigation in 3D Environments
http://vision.cs.utexas.edu/projects/audio_visual_navigation/
http://vision.cs.utexas.edu/projects/audio_visual_navigation/
Assistive Gym: A Physics Simulation Framework for Assistive Robotics
https://github.com/Healthcare-Robotics/assistive-gym
https://github.com/Healthcare-Robotics/assistive-gym
AI Playground: Unreal Engine-based Data Ablation Tool for Deep Learning
https://arxiv.org/abs/2007.06153
https://arxiv.org/abs/2007.06153
