Duplicate Windows might be a bit more popular than WindowWatcher. We know about 1 link to it since March 2021 and only 1 link to WindowWatcher. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
To see the map on your own screen, I duplicate the window using WindowWatcher. Source: about 3 years ago
I haven't used this personally, but it may get you some of the way there: Duplicate Windows app. Source: over 1 year ago
ZoomIt - Presentation utility for zooming and drawing on the screen.
Afloat - Create beautiful invoices in 3 clicks, without mistakes
Magnifixer - Magnifixer is a screen magnifier utility.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Pennywise - Cross-platform application to open any website or media in a floating window
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.