Reaction Quake 3
- A direct-as-possible port of Action Quake 2 (AQ2) to Q3A
- http://www.rq3.com/

PainKeep Arena
- Quake3Arena mod from Team Evolve.
- http://teamevolve.planetquake.gamespy.com/projects/pka/

Defrag official website
- Official website for the Quake III Defrag mod.
- http://planetquake.com/defrag

NoGhost Mod
- Mod supporting freezetag, lastmanstanding, and muckleball, amongst other server-sided configurable options, like turrets, decoys, and timeouts.
- http://noghost.servequake.com

Quake 3 MultiMod
- A plugin manager for Quake 3 that sits between the Q3 engine and the actual game mod to allow pseudo-mods to be dynamically loaded adding new functionality to a Quake 3 Mod. Similar to MetaMod for HalfLife.
- http://sourceforge.net/projects/qmm/

True Combat
- Real world weapons is only the beginning for this mod. News, downloads, forums, screenshots.
- http://www.planetquake.com/q3t/content/index.asp

Mage Legend:Fortress of Darkness
- A single-player total conversion for Q3A by PrSoftware. News, screenshots, downloads, forums, links.
- http://www.planetquake.com/prsoftware/

kickassctf.com [a division of FSK405]
- Information regarding the FSK405 Q3 Urban Terror game servers. Also includes general Q3UT information, forums and stats.
- http://www.kickassctf.com/

Urban Terror Maps Levels
- Q3 Urban Terror map depot and movie downloads.
- http://urt.frisno.com/

MadMeat.com
- Q3 Urban Terror information, forums, and downloads. |LwZ| UrT game server information.
- http://www.madmeat.com/

SuperHeroes Arena
- News, modification information, forums, and screenshots.
- http://www.batmite.com/

Navy Seals: Quake 3
- A realistic simulator for military warfare under different conditions and in different environments. News and screenshots.
- http://www.ns-co.net/

Urban TerroristZ
- Fan and news site with community interviews, tactical guides, game servers, and map downloads.
- http://www.terroristz.net/

Sidrial
- A total conversion that offers single-player and multi-player in a story-rich environment.
- http://www.fountainheadent.com/sidrial/

Western Q3
- Total conversion intended to be a realistic simulation of the "Old West's" great atmosphere.
- http://www.westernquake3.com/

Urban Terror
- Total conversion based on real world weapons and realistic settings. News, downloads and screenshots.
- http://www.urbanterror.net/

Requiem
- Includes new weapons, runes, and armor.
- http://www.reqoning.com/q3req/

Q3F
- News and discussion about a Team Fortess type modification.
- http://www.q3f.com