Hubapps (http://hubapps.com) has released Zoom 1.0, a screen enlarging utility for Mac OS X, in the Mac App Store. It costs US$2.99 and is available in the Utilities category.
Zoom “goes beyond the essential functionality for improving visibility and legibility of small text and images, providing a superior experience in the form of a unique, hypnotically beautiful zoom mechanism which keeps 100% of the screen visible while also zooming,” according to the folks at Hubapps.