From Learnpulse SAS:
Screenpresso allows you to save screenshots on your drive. Drag and drop screenshots from history directly to your favorite e-mail editor. Webmails like Gmail are also taken into account. Crop, spotlight an area, or comment parts of captured image. Make a unique image thanks to the stitching mechanism. Look like a pro. Add drop shadow, round corners, and reflection. Need to export images or create thumbnails at specific size, one click. Easy share screenshots on Twitter thanks to Twitpic integration.