Navigraph Charts now supports displaying traffic and ATC sectors from VATSIM and IVAO. I approached them and asked to integrate RealTraffic as well, and they said they will consider it if a wishlist post in their forum gets enough votes.
I've made such a post here: https://forum.navigraph.com/t/realtraff ... urce/17773
Please click that link and vote if you would like to see RealTraffic in Navigraph Charts!