We currently have these 4 tutorials for Godot and TexturePacker.Tutorials for other frameworks are available from the tutorials list.
Video tutorial: How to create sprite sheets for Godot 3 using TexturePacker.
Video tutorial (1:50): How to create tile sets in seconds for Godot 3 using TexturePacker.
This tutorial explains the most used sprite sheet types and how you can easily create a sprite sheet from a single of images. Links to free software included.
Tutorial: Create sprite sheets for your normal mapped sprites.