JsCraft by pcr3w
A JavaScript API for Minecraft Forge that allows you to create mods in JavaScript.
Json Recipes by anti344
Use JSON format(which is used everywhere in Minecraft) to add your own crafting recipes! With NBT, OreDictionary and machines other mods support!
JsonLootBags by Dries007, DoubleDoor team
Json Loot bags
JsonTweaker by Tark
Add recipes using json.
JsonifyCraft by Timothy Metcalfe (TimInc)
Add content to Minecraft with JSON files.
Judgment API by Integral
Basically, a research trigger system of Forgotten Relics, just without the addon itself. Requires MineTweaker 3 to interact with it's features.
Judys weapon by Lenovo, MCreator
JuiceWares by JuiceGrape
A random collection of fun little changes, blocks and items to help me learn modding.
opensource mobs enchanting tools
Juju's Just Desserts by aweso, MCreator
Jujutsu Kaisen by sauro
JujutsuKaisenMOD by gengen, MCreator
JukeDiscord by pendo324
A simple mod