Based on our record, Duplicate Windows seems to be more popular. It has been mentiond 1 time since March 2021. 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.
I haven't used this personally, but it may get you some of the way there: Duplicate Windows app. Source: about 1 year ago
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Afloat - Create beautiful invoices in 3 clicks, without mistakes
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
PiPer - A DIY Minecraft computer to build gadgets
Pennywise - Cross-platform application to open any website or media in a floating window
PiP-Tool - PiP tool is a software to use the Picture in Picture mode on Windows.