This should be built into OS X!

Ever since Yosemite introduced widgets in the new Today sidebar it has been apparent that the good old dashboard with HTML style widgets is on its way out the door. One of the only things I used the dashboard for was in developer mode that let widgets be used freefloating on the desktop. And then I only used a screen ruler and a stop watch. Euclid is the perfect replacement for my screen ruler needs. Its super simple, invokable with a key command that makes you feel as though its a sibling to the screen capturing key commands.

I wouldnt mind having a few more options, but as it is its very useful. And the price is right!

Greg Nacu about Euclid, v1.2