Mac: If you've ever spent an hour using Photoshop or GIMP to create tutorials by inserting instructions onto images you'll enjoy Clarify. The app creates a screen capture and allows you to append and highlight the image. Unlike other apps, Clarify has the ability to take a delayed screenshot.
Whether something goes wrong on your computer and you need a friend to help you out or you just want to show off your current setup, sometimes it's nice to quickly share what you're seeing. Graabr makes this process easy: just use the program to grab a screenshot of what you see on your computer.
"# Amberjack enables webmasters to create cool site tours, without the need to take screenshots or record screencasts.
# Amberjack improves the usability of your website through easy, great looking and helpful tours."