Screenshot Lite
by Andy Smith
Modified version of 'ScreenshotJPEG' by Aaron Williams. Takes up minimal screenspace, and has two modes - take screenshot now, and take in 5 seconds (gives you time to focus the right window). Fits neatly at the bottom of the screen, and can be hidden when not in use.
Saves screenshots as JPEGs on the Desktop, with the name 'screenshot(DD-MM-YYYY).jpg', and can append a sequential figure. It can even add a random sequence of letters and numbers for security and privacy when you're uploading a number of screenshots to your website.
Requires Mac OS X 10.3 or greater.