AnderWare Development
   Features MasterPlan, a freeware scenario-planning utility for Windows.
   http://www.anderware.org/dev/

Battlegrounds Games
   "Battlegrounds: RPG Edition" is a virtual tabletop software that allows to play any RPG online or offline. It is cross-platform, and has useful features like Fog of War.
   http://www.battlegroundsgames.com/

Codex of Universes
   Online editing of worlds and campaign settings. Users can create new universes to catalog and showcase their particular setting.
   http://www.codexofuniverses.com/

DA: The Role Player's Digital Assistant
   A tool designed to help create, organize, and run tabletop roleplaying games. [Shareware|Windows NT/2000/XP]
   http://www.mjhkstudios.com/DA/Frameset.htm

DemonSpawn Software
   An online organization devoted to providing gamers with resources and programs. MapMaker, FUDGE and T&T die rollers, all in Beta test (trial download), for PCs.
   http://www.demonspawn.net

Dices
   Open source online role playing software offering game profiles management for several games, die launch module, a map editor with support for placing players and NPCs on a map, automated recording of logs and notes management.
   http://dices.sourceforge.net/

Dire Press RPG Tools
   Random generators for use with d20 fantasy and other role-playing game systems.
   http://direpress.bin.sh/tools/

Dungeon Helper
   Play P&P over the internet with ease.
   http://dh.abomb.info

Eposic
   Free online JavaScript and Java online roleplaying tools including animated Tunnels and Trolls dice roller, random event, weather, GM decision, NPC rune generators, private dice rooms for online RPGs, gallery of downloadable images.
   http://www.eposic.com/

Fantasy Grounds
   An application acting as a virtual online gaming table primarily intended for pen and paper style narrative role playing games.
   http://www.fantasygrounds.com

Garthac Games
   Creates products that support and enhance role playing games. MageHand is a tool for creating, modifying, organizing, sharing and printing campaign information.
   http://www.garthac.com

Hamete.org's Virtual Dice Server
   Generates online and by-e-mail dice rolls.
   http://hamete.org/dserver/dices

Marnok's Adventure Generator
   Generates random adventure ideas. Each includes an overall theme, adventure hooks, goals, major and minor villains, and optional twists.
   http://marnok.com/?content=content/Role%20Playing/Adventure%20Generator.htm

Obsidian Portal
   Online campaign hosting and collaborative content database. Users can host a campaign blog that ties in with tools for tracking NPCs, items, and other game content.
   http://www.obsidianportal.com

Random RPG Idea Generator
   Provides game masters and players with random weapon, encounter, story, and trap ideas.
   http://www.randomrpg.com

Role Playing DB.
   A commercial roleplaying database manager for Linux and Windows.
   http://www.deepsoft.com/cgi-bin/deepwoods.cgi/RolePlayingDB

Tabletop Mapper
   A Dungeon Master tools which helps to control character positions and actions on a map by hiding areas players can't see.
   http://www.tabletopmapper.hpg.ig.com.br/

TenFootWiki
   A self-contained wiki as a personal campaign notebook for roleplaying gamemasters.
   http://www.unclebear.com/tenfootwiki/

The Adventurer's Diary
   A shareware Windows database application for keeping track of events and persons the player meets.
   http://adventurer.worldofbelushi.de/

The RPG-SoundMixer
   A commercial program (Demo available) for Windows specifically designed for creating musical and acoustic backgrounds for roleplaying sessions. [English/German]
   http://www.rpgsoundmixer.com/

The Roleplaying Assistant
   Freeware tool featuring character generator (for D&D, Alternity, Star Wars, in Nomine Satanis), fractal world generator, dungeon mapper and spell management.
   http://www.rpgweb.com

kLoOge.Werks - The Digital Gaming Table
   A commercial Java tool which allows playing round based and map using game to be played with a computer.
   http://www.kloogeinc.com/