Quick ILS is a simple little tool that helps you to quickly find the ILS frequency for your desired airport and runway, also during a flight.
UPDATED 2021 - now most of the airports and frequencies should be up to date!
Just type the ICAO name - or if you don't know it, part of the name of the airport (and return key).
It gives you a list of all runways with ILS frequencies. You can even double-click any runway to get a graphical display of the runway direction, length, and frequency including the ILS ident code.
The data comes from open sources, it is mostly from 2020/21.
Tell me if a frequency is wrong or missing. I can make corrections and update once in a while.