CodyWinch

Shape Key Manager Pro is a Blender addon for speeding up shape key rigging. It duplicates and mirrors shape keys while maintaining and retargeting their drivers, and transfers shape keys between objects with a single click.

Lineworks is a Blender add-on that adds rigged line strips and grease pencil lines to characters. The lines follow the character's surface based on placement and come with a rig for controlling their look.

NPR Framerate Mixer is a Blender addon for combining a character or object animated on 2s, 3s or any framerate with a camera animated on 1s. It bakes the camera offset into an empty for the hold frames.