K0lb3 / UnityPy

UnityPy is python module that makes it possible to extract/unpack and edit Unity assets

V-Sekai / unidot_importer

Import .unitypackage and other assets designed for Unity Engine as a GDScript addon for vanilla Godot 4.x

JiGuang283 / VRMify

PMX / MMD to VRM converter with a GUI: turn MMD, FBX, unitypackage, XPS and PSK models into VRM 1.0 / 0.x avatars (MToon, SpringBone, expressions) for VSeeFace, UniVRM and VTuber apps. Pure Python, no Blender or Unity. MMD 模型转 VRM 工具

SaraKale / Model-To-PMX

Convert .fbx, .unitypackage, .vrm, .uemodel, .psk, .xps and .pmx into each other