Minecraft Dev is an IntelliJ plugin that helps by providing better Mixin Support while developing, JSON Schemas for common files, and even template projects to get started.
Gradle plugin that optimizes the built jar of your mod. This works well, and can grealy reduce your built mod jars.
Cheatsheet for mixins. Includes explanations of many of the mixin injectors, and examples to go along with them.
Library that adds more mixin injectors. These new injects can be more compatible than default mixin injectors.
Docs here Modrinth is a site to upload mods & modpacks. It also contains a useful maven repository where all projects are hosted, and a free to use api
MultiLoader-Template is a template for forge & fabric projects, which will share a common source set. This works extremely well for multiplatform mods, and allows you to heavily reduce code duplication across modloaders.
This uses github actions to publish your mod to modrinth, curseforge, and github!