Another silly tool made by 8lliotZ
adsb-near-me is a tool which helps you find the airplane closest to the inputted long/lat position and also shows you some details about it. It relies on the opensky network API. I only have a free account so it's limited to about 400 credits a day, so make sure to share and not to waste em. Thanks!
Thanks to Matthias Schäfer, Martin Strohmeier, Vincent Lenders, Ivan Martinovic and Matthias Wilhelm for their paper, "Bringing Up OpenSky: A Large-scale ADS-B Sensor Network for Research". In Proceedings of the 13th IEEE/ACM International Symposium on Information Processing in Sensor Networks (IPSN), pages 83-94, April 2014.