Paparazzi!
Paparazzi! isn’t new, but it works, and works well. It takes pictures of websites using the WebKit (Safari) engine on your Macintosh. Last updated in 2006, but still just as useful, Paparazzi! lets you set a number of options including a delay, which can be useful for timing moving images or page dynamic effects. It’s not for everyone, but if you need website screenshots or captures, this is a great, free option.