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This is a paid asset, but now you can download Smart Platform Colliders Free.
Smart Platform Colliders v1.1.4.3
Fully Supports Unity 5, 2017 & 2018!
Smart Platform Colliders are an enhanced version of physic colliders included with Unity, improved to solve some problems found when using the default colliders like sticking when moving a box collider over collider joints, a slope or small imperfections, trespassing colliders when moving fast, etc.
WebGL Demo | Web Demo | Forum | Docs | API Docs
*** Features *** (click here to see a detailed list)
• Full, commented & clean source code
• Simple and easy to use and understand
☆ Updating position on Update allowing a smooth movement at max. FPS (new v1.1.2)
☆ Pixel Snap Rendering (new v1.1.1)
☆ Smart Character Controller (new v1.1.0):
New and improved platform controller versatile and easy to configure with trajectory guides
☆ Smart Platform Controller:
Basic controls: jumping, wall jumping, multiple jumping, walking, swimming, ladders and climbing areas
• Works both with 2D & 3D Unity colliders
• Integration with Unity physics 2D & 3D
• Works with rigidBody & rigidBody2D
• Works with any gravity direction
• Can be rotated & scaled
• Moving platforms detection
• One way collisions
• Pushing other objects with 2D/3D rigidbody
• Samples and scripts for making a simple platform game using the smart colliders
Credits:
– Special Thanks to Kenney for the CC0 Graphic Assets: www.kenney.nl, used for the samples
– Special Thanks to Philippe Cizaire for the Graphic Assets: http://cartoon6r.free.fr, used in the tutorial01 sample.