Virtual Magnifying Glass A free, open source, screen magnifier, for Windows, Linux, FreeBSD and Mac OS X. It is simple, customizable, and easy-to-use.

Virtual Magnifying Glass Features:
1. Display current magnification factor
2. Invert colors
3. Show the center pixels RGB values, in both decimal and hexadecimal.
4. New user setting: borderless magnifier window (can help performance with older video boards)
5. Multi-monitor support
6. Lens height up to 1024 pixels
7. Lens width up to 1600 pixels
8. Mouse scroll-wheel now controls zoom factor
9. Esc key closes magnifier window
10. Crosshairs now have tickmarks for scale factors at 4x and above
11. 1x scale factor: allows to user to quickly compare a magnifier image with the original
12. 1.5x scale factor: helps with screen reading
13. Added 3x scale factor
14. Hotkey shows/hides the magnifier (currently hardcoded to CTRL-ALT-e)

The license of this software is Freeware, you can free download and free use this desktop utility software.