Historyid Software created Quake in 1996, and released the source code to the engine (under the GPL licence) in 1999. Tonik developed the ZQuake QuakeWorld client from this, before fuh took ZQuake and turned it into FuhQuake.
The ezQuake project started in August 2004 as a derivative of FuhQuake, and today is the dominant QuakeWorld client for those playing online competitively.
Parent projects: A Nourai (fuh), Anton Gavrilov (Tonik), id Software
Founders: Robert Gust-Bardon, David Balcom (hexum)
Former project admins: JohnNy_cz, Hetman
Former developers: AAS, biomass, bliP, BorisU, Cokeman, cuky, disconnect, dkure, Electro, [EZH] FAN, Fausto, hdworak, hexum, hifi, JohnNy_cz, jogi, Jozsef, Moodles, Oldman, Oppy, povohat, qqshka, Tanelii, Tei, Tonik, Tuna, Tyrannos, Up2nOgOoD, VVD
Big thanks to: Spike, bigfoot, David Wiberg, Todd C. Miller, zxc, HyperNewbie, r00k, avirox, raz0, Dirk, quakeforge, mh, sputnikutah, localghost
Major ports: ezQuake incorporates numerous features from the following engines