Planescape Fiction Archive  
   A collection of original Planescape fiction.
   http://www.deathstar.org/~krlipka/ps/fiction/

Sigil: City of Doors  
   A site containing new planes, monsters, psionics, and links.
   http://www.geocities.com/Athens/Delphi/8556/

On The Wings of Mephits  
   A collection of original magical items, Planescape fiction, house rules, and links to other sites.
   http://www.deathstar.org/~krlipka/ps/

AARG Planescape Campaign  
   Contains player-created spells, magical items, characters, rules, and links for the Planescape setting.
   http://www.aarg.net/

Walking The Planes  
   A reference guide to the Planes, both Inner, Outer, and Prime.
   http://www.geocities.com/Area51/Dunes/4656/planescape.html

The Evergold Portal  
   Features a MUSH, font collection, and links.
   http://evergold.iwarp.com/

Hawkwind's Planescape Fiends  
   Detailed information about several of the races of Planescape along with links to other sites.
   http://members.tripod.com/~hawk_wind/planescape/planescape.html

The Roaming Genasi Tavern  
   Contains information about the various types of Genasi.
   http://users.erols.com/aburner/planescape/

The Outer Planes  
   A site with detailed information on the many planes.
   http://www.pathguy.com/planes.htm

Jenkin's Planescape  
   Contains Planewalker Guidebook which includes information about outer and inner planes, sigil, factions, blood war, as well as psionics in the planes, character point tables, planar races and classes.
   http://www.geocities.com/gradasso/

The JesterLich's Court  
   Original characters and descriptions of new factions.
   http://www.geocities.com/TimesSquare/Lair/4249/

The Ordial Plane  
   A Planescape site with new NPCs, house rules, new spells, original magic items, and some new creatures.
   http://pages.prodigy.net/shamilto/ordial.htm

Planewalkers  
   FAQ, character graveyard, and software archive.
   http://planewalkers.8m.com/

Playing in Planescape  
   Some files to download, new rules, and a page of links.
   http://www.fortunecity.com/rivendell/diablo/437/

Scripta Planorum  
   A page with information on many aspects of the Planescape campaign setting.
   http://www.geocities.com/SouthBeach/1482/ps/ps.html

Raven's Art Page  
   A page filled with original artwork based on the Planescape setting.
   http://public.csusm.edu/public/raven/images/images.html

A Tiefling's Exultation  
   A Planescape website with information on creatures, sects, and many other things related to Planescape.
   http://www.geocities.com/Area51/Vault/9974/

Unless Infinity  
   New rules, monsters, skills, and a page of links.
   http://www.geocities.com/TimesSquare/Arcade/2894/ps/index.html

Reshaping the Multiverse  
   Features new rules for the effects of character's beliefs on reality and a DOS-based character generator.
   http://www.pathguy.com/planesca.htm

Planescape Encounter Charts  
   Expanded random encounter charts for most of the Inner and Outer Planes.
   http://www.angelfire.com/games2/labyrinth/encounter.html

The Sensoriums  
   Character descriptions, archived ezines, and a related art gallery.
   http://mitglied.lycos.de/rpgart/

The Kriegstanz  
   A conversion of the factions to 3rd edition. With faction-specific characters, prestige classes, and feats.
   http://www.zachshuford.com/kriegstanz

The Carceri Exiles  
   Dedicated to the famous planescape artist Tony DiTerlizzi. Contains information about the Dispossessed Sect, art, and links.
   http://www.operatique.com/planescape/main.htm

Keys-to-the-Cage  
   Journal for the Keys-to-the-Cage Planescape chronicle with background information, character profiles, journals, and house rules.
   http://planescape.digital-magi.com