Hatchliner is a Blender add-on from Kito Studio for applying anime and hatching styles to the materials in a scene. It includes 27 presets grouped into four categories — Lines, Inks, Manga, and Shadows — and a preview UI lets you visualize each preset before applying it.
You can apply a style to an individual mesh or to specific materials, and it supports meshes with multiple material slots. New styles can overwrite or merge with existing materials, and a style can be applied across the entire scene with a collection exclusion list.
Every style parameter is customizable, and settings can be reset to their default values. Hatchliner also supports copying and pasting styles, along with saving styles to a file and loading them back. It's built for the Eevee render engine, is Blender extension compatible, and is released under the GPL license.