https://xscopeapp.com/
xScope • Measure. Inspect. Test.
xScope is a powerful set of tools for Mac OS X that are ideal for measuring, aligning and inspecting on-screen graphics and layouts.
xscopemeasureinspecttest
https://vicone.com/products/xscope
xScope - VicOne
Test and Scale to Meet Unique Requirements With VicOne’s Comprehensive yet Flexible Penetration-Testing Service
xscopevicone