https://globe.adsbexchange.com/?icao=a2c897 - track any airplane in the world, in real time. Amazing resource when your flight is delayed to see exactly where the plane is.
If you have a little technical skill, you can set up your own raspberry pi ads-b receiver really easily. Just need the raspi, and SDR dongle, and an antenna. Floghtaware provides a flash image for the OS. If you feed them data, you get a free premium subscription. I used to use it to get alerts when the state patrol speed trap aircraft were taking off so I knew not to speed on a long interstate commute.
Totally get it. My SD card got corrupted in a power outage almost a year ago and I never got around to reflashing it. To many other irons in the fire.
I must say, it was an impressively reliable setup, uptime was effectively limited by power outages. Their image is basically Raspbian which is basically debian, but I was still impressed that the service was so stable.