A4000_Mad:
SGrab also works from command line, so you can include it to any script or tool manager etc... I have SGrab as a global hotkey in Magellan.. so I just hit certain key combination to grab any frontmost screen to ram: as png. And with little delay, so that I have time to open some menu or whatever I want to include in the shot. I don't like to use any GUI:s or icon clicking or similar on this kind of job

TurboPrint also has nice grabber with hotkey...