Cool Aviation Site
This is the link for the ADS-B Exchange (Automatic Dependent Surveillance-broadcast) tracking map. It shows all aircraft in the air with a transponder, except for military and some civilian aircraft. Fun to see things in real-time and it even shows weather balloons. And it is truly real-time - when it shows an A/C overhead, it's overhead.
ADS-B Tracking Map13 June 2020, 07:16
Grizzly Adams1I've been using this site to see who's passing overhead here. Not as crowded as before Covid 19
https://planefinder.net/# Grizz