Easy Measure Tool

It's fast and simple.
Features:
* Live distance measurement.
* Viewport gizmo line with numeric labels and the measurement lable between measured points/objects.
* Units support: mm, cm, m, km, in, ft, yd, mi.
* Straight-line distance or shortest path along edges between 2 selected vertices.
* Distance between 2 selected objects: Origin to origin and between Closest vertices.
* Active-to-reference object mode with live dragging.
* Object names shown in the sidebar as 1. and 2 with matching markers above the gizmo endpoints.
* Works in multi-object Edit Mode with object-pair fallback.
* Cached object data for faster repeated measurements.