A list of all the useful tools i've found to speed up my work flow for creating avatars.
More can be added to this list if you know any.
https://github.com/lyuma/Av3Emulator
The emulator used to play and test animations in unity.
In the default VCC.
https://github.com/BlackStartx/VRC-Gesture-Manager
A simpler version of Av3 with better ui. Will give the nice ui to Av3 when both are installed.
In default VCC.
https://github.com/VRLabs/Avatars-3.0-Manager
A tool for managing playable layers and parameters for an avatar.
Curated in VCC.
In defualt VCC.
https://github.com/rurre/PumkinsAvatarTools
Used to fix, copy, and scale data on avatars.
VPM link: https://rurre.github.io/vpm/index.json
https://github.com/febucci/unitypackage-custom-hierarchy
Easyer to read hierarchy.
https://github.com/kurotu/VRCQuestTools
Convert some stuff to work quest quicker.
https://github.com/Thryrallo/VRC-Avatar-Performance-Tools
Used to check VRAM and other stats before uploading the avi.
VPM link: https://thryrallo.github.io/VRC-Avatar-Performance-Tools
https://github.com/CascadianWorks/Unity-Mesh-Transfer-Utility
A tool that lets you join meshes in unity so you don't have to use blender.
https://vrcfury.com/
An editor tool used to combine playable layers, and optimise avatars.
VPM link: https://vcc.vrcfury.com/
https://github.com/d4rkc0d3r/d4rkAvatarOptimizer
Combines skinned mesh renders and materials in unity.
VPM Link: https://d4rkc0d3r.github.io/vpm-repos/main.json
https://github.com/poiyomi/PoiyomiToonShader
Poi.
https://github.com/lilxyzw/lilToon
LilToon.
https://github.com/netri/Neitri-Unity-Shaders
Effects shader.
https://github.com/Leviant/ScreenSpace_Ubershader
Screen space shader effects.
https://github.com/hai-vr/lightbox-viewer
Lets you view different lighting conditions to fine tune your shaders.
https://github.com/llealloo/vrc-udon-audio-link
Make the avatar react to music in the world.
In default VCC.
https://shatteredfur.gumroad.com/l/vrctoggle
Make toggles extremely quickly by just selecting a game object.
https://dreadrith.gumroad.com/l/CEditor
A useful tool to make animation transitions much faster.
(Paid)
https://github.com/rrazgriz/RATS
Animation qol plugin that lets visualize stuff better.
VPM link: https://vpm.razgriz.one/index.json
https://github.com/Dreadrith/Unity-Animation-Hierarchy-Editor
Tool made to remap broken animation paths.
https://assetstore.unity.com/packages/tools/utilities/play-mode-save-177452
Choose what asset to save when in play mode.
(paid)
https://github.com/VRLabs/Local-Mirror-Detection
Used to have different things happen in mirrors.
https://github.com/VRLabs/World-Constraint
Hold an object in world space.
https://github.com/hai-vr/av3-animator-as-code
Write code to crate animations in bulk.
https://github.com/NotAKidOnSteam/FreeCam
Move the game camera around in play mode.
https://github.com/Markcreator/Unity-Tools
Auto texture optimizer.
https://github.com/VRLabs
All of VRLabs prefabs are extramly useful.
https://github.com/ThatFatKidsMom/Avatar-Prop
Used to let other users grab objects from your avatar.
https://github.com/absolute-quantum/cats-blender-plugin
Used to speed up some of the tedious actions in blender.
https://github.com/Grim-es/material-combiner-addon
Use to automaticaly atlas texture and combine materials
Dependency for cats.
https://github.com/Spokeek/awesome-ndmf
NDMF is a modular framework providing hooks for tools to create non destructive workflows in Unity.
Since this gist is two years old I will continue it here https://gist.github.com/Kavex/f68a5e4f1b7917d2cd503a6bc29fd8f4