Meander is described as 'An original way to measure routes, shapes, areas, anything that you can see on your screen Simply draw your line with mouse clicks on a nearly-transparent window over your map, chart or diagram Set Meander's scale against a known distance A selection of units included;'. There are more than 10 alternatives to Meander for Windows, Mac, Linux and Online / Web-based. The best alternative is Meazure, which is both free and Open Source. Other great apps like Meander are On-Screen Ruler (Free), PixelStick (Paid), Measure Schmeasure (Free Personal) and ScreenRuler (Free, Open Source).
What are the dimensions of that image? How big is this window? Does this layout fit on an NTSC display? What color are these pixels? What does this icon look like close up? How can I capture an arbitrary portion of the screen?
On-screen Ruler is a lightweight, free, semi-transparent ruler to measure portions of the screen. It has a lot of features (and related keys shortcuts) and several language translations are available too.
ScreenRuler lets you measure objects on your Ubuntu desktop using six different metrics. FEATURES * Horizontal and vertical measurement in 6 different metrics: pixels, centimeters, inches, picas, points, and as a percentage of the ruler’s length.
GizmoLoupe is a simple utility to analyze (with zoom) images of your screen, measure the dimensions of objects on the screen and determine pixels color. GizmoLoupe also allows drawing a route on a map, to set the scale and to calculate the length of the path.
Yardstick is a small Utility, which helps you to measure anything, you can display on your screen. You draw a line or a polygon across the document to measure and Yardstick tells you the overall leng th and the area enclosed by the polygon.