Auto-Rig Pro V3.69.39 (Blender)
Auto-Rig Pro is an addon for Blender to rig characters, retarget animations, and provide Fbx/Gltf export, with presets for Unity, Unreal Engine, Godot.

• Automatic bone placement solver based on mesh recognition for bipeds characters. Asymmetrical models supported.
• Edit Reference Bones feature to modify the rig anytime you want. No need to redo everything if a bone is not where you want it to be.
• Apply Pose as Rest Pose feature to quickly change the rest pose of the character, aligning reference bones on it and applying armature modifiers in a single click
• Modular: only rig what you need. Fingers, toes, ears, breast, adjustable amount of spine, neck, twist bones, tail, and neck bones... • Duplicate, remove limbs to rig creatures with multiple arms and legs.
• Fingers auto-rotation option: bend when scaling the first phalange, pre-defined fist pose
• Easy controller shape edition
• Bone picker: Can be turned on/off, import/export presets. Customizable.
• Colors customization
• Cartoon compliant: stretchy spine, legs, arms...
• IK-FK snap autokey compliant, snaps properly when unlocking all the leg/forearm rotation axis
• IK-FK controllers auto hide
• Hybrid IK pole / IK arrow vector
• 2 or 3 bones IK chains for legs
• Knees and elbows pinning
• Head rotation locked or free
• Bend all fingers in one click (fingers grasp), fist pre-defined pose, auto rotation of fingers phalanges from scale
• IK/FK eyes
• Auto-eyelid rotation
• Multiple Child-Of constraints support for the IK hands and feet to change their parent space any time (e.g. if the character is driving a car, hands on the wheel, then grab the car door)
• Complete set of secondary controllers for fine pose sculpt
• Advanced facial setup with automated placement
• Improved skinning based on Blender's heatmaps. Auto-splitting of multiple elements + voxelization. Compliant with the Voxel Heat • • Diffuse Skinning addon.
• Shape keys drivers creation tool
• Game engines support, FBX, GLTF: Unity - Unreal Engine - Godot. Generic, Humanoid and Universal rig type
• Bone remapper to retarget any armature action to another one, with different bone names and bone orientations. IK support. BVH, • • FBX files compliant, e.g. Mixamo animations.
• Compliant with X-Muscle System for realistic muscles simulation

https://blendermarket.com/products/auto-rig-pro