Zoomtext is described as 'Screen magnification and enhancement software for vision impairment, offering variable magnification levels, clear text with xFont, color, and pointer customization' and is a screen magnifier in the os & utilities category. There are more than 10 alternatives to Zoomtext for a variety of platforms, including Windows, Mac, Linux, PortableApps.com and Ubuntu apps. The best Zoomtext alternative is SHARA. It's not free, so if you're looking for a free alternative, you could try CapyCursor or ZoomIt. Other great apps like Zoomtext are Magnifixer, KMag, ZoomShot and OneLoupe.
ZoomIt is designed for screen annotations. Functionality is not comparable.