#2846
If we know one fact that TechSmith's Snagit is the #1 screenshot/screencast tool on Windows, than for Linux, the king of screen capture software will be Shutter (formerly GScrot) - of course, it's freeware and open-source, developed by Mario Kemper from Canada.

#2556
Ashampoo Snap is an old-brand and powerful screenshot & screen capture tool from Germany, if you are already getting fed up with TechSmith's Snagit on Windows, then try Ashampoo Snap's innovation way for producing, editing and sharing the screenshot and screen capture.