PCGen (An RPG Character Generator) is a FREE Open Source RPG character generator and maintenance program (d20 Systems mainly) that works on most personal computers (It's Java-based so: Windows, Mac OS X, Linux, Unix are supported). All datafiles are ASCII so they can be modified by users. All of this work is performed under the watchful gaze of the PCGen Board Of Directors.

PCGen Features:
1. Allows you to Create and Maintain multiple Characters.
2. Is FREE and works on all major operating systems (Windows, Linux, UNIX, Mac OS).
3. Data and character files are operating system independent.
4. Supports d20 based Game Systems including D&D (3E, 3.5E, 4E), d20 Modern, Pathfinder, d20 Modern.
5. Supports Tons of Publishers and their products.
6. Is highly configurable, allowing the user to add or remove races, classes, feats, and house rules such as unusual class or race restrictions.
7. Supports level advancement, with configurable progressions of feats, skills and ability score bonuses.
8. Produces numerous customized character and party sheets in HTML, TEXT and PDF formats.

GMGen Plugin Features
1. Track combats, including damage, spells, and can even roll attacks. The current combat state may be saved for those game sessions which end in mid-combat.
2. The combat tracker has a full stat block for loaded characters/enemies. If you want to see how your abilities look, you can pop up GMGen if you don't want to export a character sheet.
3. Assign experience based on defeated combatants' CRs and the party level.
4. Create encounters, generating the monsters on demand.
5. Manage a campaign world through a notes system that allows word processing, as well as the ability to attach files to particular notes and the ability to launch those files/characters from the note.
6. Generate random names for people/places/things.
7. Calculate travel times and inn costs according to the SRD.
8. Create 'dice bags' with any dice expression (such as 1d6-2d4+3).

Requirements:
* Java 1.5 or above

The license of this software is Free, you can free download and free use this game utility software.