Magnifixer - Magnifixer is a screen magnifier utility.
Epic Pen - A windows tool for drawing over your desktop and applications
Virtual Magnifying Glass - Virtual Magnifying Glass, a free, open source, screen magnification program for Windows, Linux, FreeBSD and Mac OS X. Free full version download and instructions for use.
Teampaper Snap - Take a snapshot, highlight key areas and share feedback
ZoomIt - Presentation utility for zooming and drawing on the screen.
Pylote - To draw on the screen and to handle the instruments of geometry there.