Plastuer 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
You might find this helpful. Let's you set any gif, video, or webpage as your wallpaper. Source: over 2 years ago
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Video Paper - Set a video as your wallpaper.
PiPer - A DIY Minecraft computer to build gadgets
VDesktop - VDesktop is a program that allows users to have animated wallpaper on their Windows desktop.