Slime Block in Redstone Tab
The creative inventory is extremely cluttered and needs updating. This client-side mod allows you to move any item or tag to any tab, and creating new tabs. There are two config files that can be dynamically changed and updated with the /reload command in Minecraft. Check Github for a more in depth explaination of the config files.

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Find on GitHub
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Find on CurseForge
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Find on Modrinth