EQEMu is the nickname for the EverQuest Server Emulator. EQEMu is a cross-platform console application which emulates the TCP/IP protocol used by Sony Online Entertainment America's EverQuest∞. EQEmu can handle the basic to advanced features of the EverQuest client, and is (excluding the LoginServer and MiniLogin) licensed under the GNU General Public License.

For more information on EQEMu, please see the following wiki links.

EverQuest -- Sony Online Entertainment America's EverQuest.
DoNotPatchWarning -- What patching is, when to and not to patch, and more.
EQVerCheck -- A third-party tool on determining what EQEMu version your patch is.
PlayGuide -- A step-by-step guide on configuring your EverQuest installation for use with EQEMu.
LinuxServer -- Setting up EQEMu on a Linux server.
WindowsServer -- Setting up EQEMu on a Windows server.
Windows6 -- A different wiki entry for setting up EQEMu 0.6.x on a Windows server.

Feel free to edit the wiki and edit/add links as the documentation expands.