Free Software

Free software on the Web related to gaming.

Character Generators

ANATHEMA - A character generator for Exalted
Byakhee - generate BRP System characters for Call of Cthulhu and Delta Green.
DC Character Builder - for Mayfair's DC Heroes RPG.
EdExalted - A character generator for Exalted
EdX - character generator for Tri-Stat dX
The Keep - GM assistant, calendar, campaign-log for Call of Cthulhu, supports Byakhee 3.
PCGen - D20 System character generator.
Redblade 3.5e - freeware character generator & bare-bones die roller for D&D v3.5 & similar games
Rolemaster character generator - java application for Rolemaster fantasy
GURPS character sheet - freeware character generator for GURPS 4e. Java-Application
Marvel Super Heroes Character Generator - Freeware character generation and die-rolling software for Marvel Super Heroes.
Tinwatchman D&D 4e Starting Character Generator - Free basic character generator for D&D 4e. Cross-platform compatible. Generates 1st level characters only.
http://rpgvirtualtabletop.wikidot.com/tokens - tokens (free & paid)
Hero Poirtrait Creator
http://www.rptools.net/index.php?page=tokentool - Token Creator

HexTML - free ad web-based map maker with fog of war, GM notes and real-time sharing
AutoREALM - freeware map creation program with expansions.
Dungeon Forge - Free, easy-to-use map creation program. Fast and flexible, it can produce maps in the style of Dungeoncrafter and Dundjinni (as well as using the same range of art), and can be printed for tabletop use or used in online games.
Mipui - Free and open source online mapper with real-time collaboration, fog-of-war and line-of-sight, emphasizing ease of use.
Blender - open source 3d graphics software
Gimp - open source 2d graphics software
Dungeon Painter Online - free online map maker
PyMapper - Map Maker
http://rpgvirtualtabletop.wikidot.com/mapping-software - List of various mapping tools
http://www.gozzys.com - Random Map Generators for Dungeons, Caves, and Wilderness.
http://donjon.bin.sh - Random Generators including Maps of various varieties.

http://audacity.sourceforge.net - open source sound recorder/editor
http://www.freesound.org - sounds
http://www.pdsounds.org - public domain sounds - sound library
http://sounddogs.com/ - sound effects
http://tabletopaudio.com/ - Original, 10 minute ambiences and music-loops for your tabletop role-playing games.

Everchanging Book of Names - a random name generator for many cultures, real and otherwise.
Hero Machine - generates pictures of RPG characters and NPCs.
Role Playing Tools - Online gaming tabletop. Chat, token/mini creation, dice tools, map sharing, scriptable. Open Source, Java, Free!
TheDarkTools - campaign and character organizer for the original World of Darkness setting.
Inspiration Pad Pro - Free random generator that uses text files so you can create your own tables. Easy and customizable. Win, Linux, CGI for web publishing.
DiceMage - One of the most useful things for running a game - a PC-based Dice Roller.
NameMage - Either use the included name sets, or create your own. It's a great program when in a bind.
"Dungeons & Dragons" Dice Roller - Don't let the name fool you, this program is anything but D&D-centric. It includes one capability DiceMage doesn't - the ability to create a custom dX. Ever needed to decide between 15 things? You can! Good luck, good gaming!
Tinwatchman Initiative Tracker - free web-based initiative tracker for multiple game systems. There's also a version specifically optimized for the iPhone and iPod Touch available here.
Black Lich free webapp to assist DMs manage combat. Look up monsters and roll saving throws, attack and damage with all modifiers pre-calculated.