IDE
From ZDoom Wiki
Internet Doom Explorer, or 'IDE', is a multiplayer browser/launcher for CSDoom, ZDaemon, and Skulltag. IDE helps you browse servers effectively so you can find the games best suited to your preferences. You can sort servers by level, Wad file, server name, server IP, gametype, or ping. You can also start your own server with just a few clicks.
If IDE isn't your bag, try Doom Connector.
