r1ch.net anticheat
- An anti-cheating system for Quake II designed to stop all known hacks. Works with three popular Quake II clients to provide a fair gaming environment for everyone.
- http://antiche.at/

Weapons of Destruction Xtreme
- mod with customizable weapons and powerups
- http://www.netdoo.com/wodx/

Tenebrae
- A modification that adds stencil shadows and per pixel lights to Quake. Includes downloads, screenshots and progress reports.
- http://tenebrae.sourceforge.net/

Jake2
- The Quake 2 engine ported to Java. Includes screenshots, downloads and progress reports.
- http://www.bytonic.de/html/jake2.html

QBism
- Modifies Quake 2 source code via the QFusion project. Uses Quake 3 format media maps, models, and shaders.
- http://qbism.com/

Action Quake 2: The Next Generation
- One of the most used Action Quake2 variant in Europe and Australia/New Zealand. Successor of the german PGBund Edition and the british Barrysworld Millenium variant.
- http://aq2-tng.sourceforge.net/

The Gloom Map Depository
- Maps, information, news, and reviews.
- http://www.planetgloom.com/gmd/

Echon.org
- OpenGL-only engine modification designed to improve the game with technologies such as shaders and advanced particle effects.
- http://www.echon.org/

R1Q2
- Engine modification focusing on providing a secure, stable and high performance client and server.
- http://www.r1ch.net/stuff/r1q2/

Vortex
- Deathmatch and Capture the flag where players build a character by gaining experience points.
- http://www.planetquake.com/vortex

QPong
- A modification based on Pong. Includes downloads, screenshots and a forum.
- http://www.planetquake.com/teamreaction/qpong/index.shtml

R1CH's Quake 2 MODs
- Includes project information and downloads.
- http://www.r1ch.net/q2/

Roll Your Own
- A program designed to create mods. Includes downloads, a forum and mod information.
- http://tarot.telefragged.com/ryo/

Quake2 Cluster Project
- Project to develop a common API among Q2 mods. Includes downloads and a mailing list.
- http://www.planetquake.com/logic/

Window Of Retaliation
- New episode for Quake2. Includes 9 new levels, new weapons, some new enemies and a few puzzles. Can also be played in DM.
- http://www.planetquake.com/roseville/

Planetgloom
- Includes maps, downloads and a forum.
- http://www.planetgloom.com/

Q-Racing
- Race Micro Machines cars.
- http://www.telefragged.com/flitsoft/

TagYerIt: One Against Many
- A server-side deathmatch mod. Includes mod information and downloads.
- http://www1.shore.net/~steqve/qm/tagyerit.html

Lithium II
- A server-side mod. Includes downloads, news, a FAQ and a web board.
- http://www.planetquake.com/lithium/

NIQ (No Item Quake)
- Server-side mod which completely removes all items from the game. The server controls which weapons all players have, making the game play emphasize fighting skills.
- http://www.planetquake.com/niq/

Weapons of Destruction Info Page
- Information and FAQ for "Weapons of Destruction", a Quake 2 modification.
- http://nettrash.com/users/kosh/wodinfo.htm

Mod Central
- Includes mod news, reviews, interviews, and guides.
- http://www.planetquake.com/modcentral/