On Monday, July 10, 2017 at 3:01:25 PM UTC-4, wrote:
http://ywtw.de/igcsimen.html

Sure miss this handy app. Other than SeeYou, what do you use to "replay" an IGC file?

I have this app as a program that runs locally on my computer but it now has
a Java script error upon opening it. (http://www.ywtw.de/Cesium/Build/Cesium/Cesium.js)
Google Earth will read IGC files to show you the track.
But paraglidinglogbook.com will allow you to replay your file in a 3D map.

Another pretty good IGC file viewer:
https://alistairmgreen.github.io/jsigc/