A public server at nethack.alt.org, commonly known as NAO, gives access to NetHack through a Telnet interface. A Java Telnet emulator is also available on the same site. Ebonhack connects to NAO with a graphical tiles-based interface.
NetHack also has an IRC channel, #nethack, on the Freenode network. Many people discuss the game there, and the resident announcer bot, "Rodney", notifies of every death, ascension and wish that occurs on the NAO server. Rodney can also announce full and new moons, as well as providing a substantial database of information which players can access with commands.
Enhanced graphical options also exist, such as the isometric perspective of Falcon's Eye and Vulture's Eye, or the three-dimensional rendering that noegnud offers.