Free Unity Tool: 2D Platformer Character Controller Script (Brackeys)

Overview

Brackeys shares a free to use character controller for 2D platformer games in Unity as a single C# script, CharacterController2D.cs. The controller features smooth movement, jumping, crouching, events for setting up animation and 2D physics through a Rigidbody2D.

The README says the script is based on the one Unity provided in its Standard Assets and points to the Brackeys video on 2D movement for usage. The script is a free GitHub download with no project or scenes included.