Pterodactyl - Pterodactyl is the free game server management panel designed by users, for users.
GameTracker - GameTracker is your one-stop social network for gamers with game server stats, website plugins, and...
Linux Game Server Managers - The command line tool for quick, simple deployment and management of dedicated game servers.
gamemonitoring.net - gamemonitoring.net is a unique tool for search and promotion of game servers.
Pufferpanel - It's made for hosting your Minecraft server. It's open source.
aGSM - freeware game servers info scanner tool for Quake 1-3, HalfLife Counter-Strike, Warcraft 3, BF1942, AAO, JediKnight 2, MoH: AA, Diablo, Unreal, RtCW, HalfLife, SoF2, and many other LAN & Internet multiplayer games server