https://drawonscreen.com/vs/epicpen/

I built this tool because I needed to make YouTube Devlogs faster and annotating in DaVinci Resolve took hours.

It allows you to annotate your screen (draw over other apps) and interact with your webcam in real-time (it supports up to 4 webcam configurations).

The app was built from the ground up to reduce cognitive load to a minimum. All tools are spring-loaded and intuitive. Want to draw something? Just swipe. Want to write some text? Double-click. Want to zoom in on something? Scroll up.

It's available for all 3 OS-es, and it's a one-time purchase that you can install on up to 5 computers. Free to try without a credit card.

If you're a content creator or a story teller, I think you'll really like this tool.