Arcade Bike Physics is very easy to use Arcade style Bike Physics Tool. You can create drivable Bikes under 1 minute.

FluXY simulates 2D fluids that look 3D, using your GPU. Can be used to simulate fire, smoke, paint, water, trails, and a variety of VFX.

Physics Based Character Controller is a feature-rich, highly customizable rigidbody based character controller super easy to pick up and use out of the box and / or customize

Fast GPU based clothes simulation for 3D Projects.

Magica Cloth is a high-speed cloth simulation operated by Unity Job System + Burst compiler.<br>Both BoneCloth driven by Transform and MeshCloth driven by mesh are available.

Get more realistic results and save tons of time placing objects into your scene with physics.

Universal plugin for creating linear/ bezier splines in Unity Engine

Wheel Controller 3D is a complete alternative to Unity's inbuilt WheelCollider. It allows for more realistic vehicle behavior, complete customization, and 3D ground detection.