A free, open source, screen magnifier, for Windows, Linux, FreeBSD and Mac OS X.
Virtual Magnifying Glass is a free, open source, cross-platform screen magnification tool. It is simple, customizable, and easy-to-use.
Latest Features:
Experimental Dynamic Mode added
Experimental Mac OS X version
Show the center pixel's RGB values, in both decimal and hexadecimal.
Multi-monitor support
Lens height and width can have any size
Mouse scroll-wheel now controls zoom factor
Esc key closes magnifier window, but it remains on systray. Q key closes the software
Crosshairs now have tickmarks for scale factors at 4x and above
Variable scale factor from 1x to 32x in
New configuration dialog to choose the plugin, Hotkey and other settings
A list of which features are currently available on the Linux version can be found on the README file distributed with it.

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