I am updating Gotcha! (screen capture utility).
Gregg's done a great job of transforming a poorly designed app into an alternate version he calls Gotcha-Quiet that "just works". No unnecessary windows cluttering your Desktop, no pointless popups - just press PrintScrn and it captures whatever you set as your default (window, screen, etc).
If you need change what's captured (say, an area of the screen rather than a window), just press Alt-PrintScrn to bring up its Settings. There you can press a button to do the kind of capture you need on a one-off basis, or you can change any of the defaults (capture type, directory they're saved in, etc.).
It's a vast improvement. Kudos to Gregg!
BTW... if you're a fan of bad design, the original version is still available. Gregg's made improvements to that one too.