Dan-Gry

Faster FBX Exporter is a Blender add-on that forks the default .fbx exporter and can be substantially faster than the standard one. It targets static objects with modifiers and enables Export Selected by default.

Half Knife is a knife tool for Blender optimized for a fast cutting workflow. It supports cuts with or without an initial selection, multicuts from face or edge mode, and several modal snapping options.

ND Primitives is a Blender add-on for adding non-destructive parametric primitives. Shapes can be edited in Edit Mode without applying modifiers, and the modifier can be re-enabled later to keep tweaking parameters in Object Mode.