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Easy Patch 2 is a retopology patching tool for Blender that lets you draw a patch boundary freely and generate quad mesh using only N-Poles and E-Poles. You control edge flow instead of relying on full automation.

Easy Envelope is a Blender addon for weighting and skinning that builds on Blender's envelope weight algorithm, letting you customise each bone's envelope range and view affected vertices in real time.

BoneX is a Blender addon for creating bone physics animation driven by the PhysX engine. It generates rigid body simulations for character physics, with adjustable rigid body properties, connection stiffness, and damping.