Motion Path Ultimate is a Blender add-on that lets you create and edit object and armature motion through motion paths, with real-time viewport control. It supports handle and gizmo editing and includes extra tools for quick adjustments across multiple motion paths at once.
Recent versions add proportional editing along with smooth, space, and reduce keys tools. You can adjust the keyframe points of a motion path using the G, R, and S keys, and use Ctrl+click to select loop points. Updates have also stabilized the logic of both object motion paths and bone motion paths, and changed the object motion path adjustment logic for better performance.
The add-on is compatible with Blender 5.0 and 5.1, with its menu panel merged into the Animation tab of the n-panel. It is released under the GPL license and marked as Blender Extension Compatible. Documentation is available, along with a demo video, and the developer welcomes questions through Superhive before purchase.