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.

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.

Vassilakos RPG Programs
Many downloadable RPG GM tools, including mappers, character and party generators, and attack generators. Most for AD&D, also Traveller, Top Secret. Compiled for MSDOS, many with QuickBasic code.

Irony Games
"On-web support for Roleplaying Gamers." A nearly exhaustive set of on-web software roleplaying tools, including the first on-web dice roller, PBeM server, and map editors, with links to tools they don't host. That's all free - they also have a bookstore.

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.

Role Playing DB.
A commercial roleplaying database manager for Linux and Windows.

Tabletop Mapper
A Dungeon Master tools which helps to control character positions and actions on a map by hiding areas players can't see.

GDSWare
Features WhosNext, an utility which is intended to help running combats with rolling for inititive and keeping track of damage for multiple characters.

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.

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

The Adventurer's Diary
A shareware Windows database application for keeping track of events and persons the player meets.

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

AnderWare Development
Features MasterPlan, a freeware scenario-planning utility for Windows.

Random RPG Idea Generator
Provides game masters and players with random weapon, encounter, story, and trap ideas.

Character Software Companion
Compiles 25 Rolemaster Standard System and Fantasy Role Playing core rule books and companions into one easy to use program.

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

Hamete.org's Virtual Dice Server
Generates online and by-e-mail dice rolls.