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.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Magnifixer - Magnifixer is a screen magnifier utility.
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
ZoomIt - Presentation utility for zooming and drawing on the screen.
PiPifier - PiPifier is a macOS 10.