greasepencil
There are 3 repositories under greasepencil topic.
bergamote/greaspencil_nudge_frames
Blender Grease Pencil Addon
theCalcaholic/blender_gp_reproject_all_frames
Reproject greasepencil object to view for every frame
Splits285/Gpencil_draw_switcher
Blender addon to allow making hotkeys which switch between brushes and/or materials. Useful for using holdouts as an eraser.