IGZ is an alternative to Hamachi, Leaf, and similar programs.

Regarding GameRanger - it doesn't support The Shadow of Death or In the Wake of Gods, which means it doesn't support The Restoration of Erathia either. There's no rating system, and I couldn't find any game statistics. There are no separate lobbies for games. Install IGZ and compare them. But honestly, you can switch to that one if you want, I don't care.