Linux screenshot app GScrot reborn as Shutter
Serendipitously, we just received a tip that GScrot (which should have appeared on my list of badly-named applications) has been re-launched with new features and a less anatomical-sounding name: Shutter.
Shutter supports a good array of features including basic editing and annotation and it's extensible through the use of plugins, a number of which come pre-installed to add effects to your images. There's also a censor tool to quickly obscure private information like email addresses from your images. Captures can be full screen, windows, regions, and full web pages, and can be directly saved in multiple format or uploaded to a number of image hosts with minimal fuss.