LogMeIn Hamachi, ZeroTier, Radmin VPN, Wirelends, Bowstring, Exophase, GameSpy Arcade, Wippien, Tunngle, P2PVPN, 333networks MasterServer, Raptr, Voobly, DynVPN, NetOverNet, Wippien NWRK, NeoRouter, Hin2n, GameTracker, BoomBaxer, IPOP (IP-over-P2P), SocialVPN, Tinc VPN, devP2P, GameRankr, Playfire, Gamerate are some alternatives to GameRanger.