Screenshot tools for Mac do more than just capture what’s on your screen; Grrrabit takes screenshots and uploads them online for you, while SnapNDrag is one of the few tools that lets you take a time delayed screenshot of your entire screen. Pixa is a free Mac app that not only captures screenshots, but also builds a library of them. It is equipped with a picture manager that can help tag images and filter them by color. The app has an excellent interface, and lets you easily browse images on your Mac. You can create folders and projects to keep your images organized, and quickly export them in JPG and PNG formats.