4t Tray Minimizer might be a bit more popular than Pennywise. We know about 1 link to it since March 2021 and only 1 link to Pennywise. 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.
Afloat - Don't know if it will work for macOS 12. If it's just for safari alone, you can try Pennywise. Source: about 2 years ago
The closest you will get is using a system utility that minimizes open programs to the tray. For Win, I suggest 4t Tray Minimizer Free. Source: about 1 year ago
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
RBTray - Allows almost any program to be minimized to the system tray by right clicking its minimize button.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
SmartSystemMenu - SmartSystemMenu extends system menu of all windows in the system
PiPer - A DIY Minecraft computer to build gadgets
Minime - Minime is a tool that allows you to minimize applications to the system tray using a simple hotkey.