slop - 7.4-1+b2 main

slop (Select Operation) is an application that queries for a
selection from the user and prints the region to stdout. It grabs the
mouse and turns it into a crosshair, lets the user click and drag to
make a selection (or click on a window) while drawing a pretty box
around it, then finally prints the selection's dimensions to stdout.
.
Features:
.
* Hovering over a window will cause a selection rectangle to appear
over it.
* Clicking on a window makes slop return the dimensions of the
window.
* Clicking and dragging causes a selection rectangle to appear,
renders pretty well (compared to scrot). And will return the
dimensions of that rectangle in absolute screen coords.
* On startup it turns your cursor into a crosshair, then adjusts the
cursor into angles as you drag the selection rectangle.
* Supports simple arguments:
* Change selection rectangle border size.
* Select X display.
* Set padding size, even negative padding sizes!
* Set click tolerance for if you have a shaky mouse.
* Set the color of the selection rectangles to match your theme!
(Even supports transparency!)
* Remove window decorations from selections.
* Supports OpenGL hardware acceleration.
* Supports textured themes.
* Supports programmable shaders.
* Supports a magnifying glass.