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GURPS Lite - http://www.sjgames.com/gurps/lite/
Free 32 page PDF version of the GURPS rules. "Covers the essentials of character creation, combat, success rolls, magic, adventuring, and game mastering." |
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Impresa Modular Roleplaying System - http://www.pigames.net/impresa.php
Modular RPG construction set. Free express rules for download include open collaborative license. |
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The Window - http://www.mimgames.com/window/
Flexible, modular rules built around three gaming precepts. |
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DUDE Role-Playing Game - http://kuoi.asui.uidaho.edu/~kamikaze/DUDE/
This diceless universal determination engine is a one-stat, cinematic, freeform RPG, with several sourcebooks. |
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Draft RPG - http://www.ekkaia.org/rpg/draft/
A small set of rules suitable for running campaigns of independent backgrounds. Open content license, downloadable in PDF format. |
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http://www.homebrew.net/games/opigs.html - http://www.homebrew.net/games/opigs.html
Simple one page gaming system. |
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Cyno's Roleplay - http://www.cynosurex.com/Cyno%27s%20Role-Play/
A universal RPG by Chieh Cheng. Approx. 33 pages HTML rules, plus four 10-15 page genre books (fantasy, modern, near-future). |
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Alternate Realities - http://www.karimnassar.com/AR/
A free universal RPG by Carter Butts, Karim Nassar, and Brian Rayburn. Approx. 88 pages (HTML, MS Word, Postscript). |
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Oroborus multi-genre RPG - http://www.ragnarokpress.com/oroborus/
Rules light, point allocation, skill based game from Ragnarok Press. |
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Simple Rules Engine - http://dmsteve-jp.tripod.com/
A two page generic skill and attribute based roleplaying engine, focused on characters and stories. |
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Ex Mortis V 1.0 BRPS - http://www.angelfire.com/games3/exmortis/
Ex Mortis base role playing system. Free to the public. Fully functional RPG. |
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http://www.talesofadventure.net/1whatsnew/ - http://www.talesofadventure.net/1whatsnew/
A model reality kit, where what seems real is real. |
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EGO-Endless Gaming Options - http://red-irish.itgo.com/Games.html
A simple, universal system, with a stable core rule, a complete foundation, and plenty of room for modifications. Free to all. |
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Dramats Personae - http://www.malaan.com/dramatis/dramatis.htm
Free simple role-playing system; there are no statistics, little math, no complex charts of equipment, and no magic. Characters represent skilled, but human (or roughly human), beings and have to use their wits rather than their powers, attributes or magic items to succeed. |
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POLY, a free, customizable system for table top and LARP - http://www.angelfire.com/rpg2/undermine/index.html
A modular system that is adaptable to many styles of play. |
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Universal - http://www.angelfire.com/games4/doctorwhoeyespy/index.html
Features a free, universal roleplaying game system. Also includes supplements for the fantasy and Doctor Who genres. |
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Fantastic Realities - http://jeremy.gagliardi.com/Real-Playing/
Works with any time period and genre, includes 16 species, magic and monster systems, and realistic rules all of which are optional. |
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Player's Labor-saving Utility System - http://www.chorazin.org/jorune/plus/
Alan Glvoer's archive of Joe Coleman's PLUS RPG. |
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OPIGS Supers - http://www.homebrew.net/games/opigs.supers.html
One page gaming system for super heroes. |
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The Awakenings Rules Engine - http://www.geocities.com/tare_rpg/
TARE, a universal rules engine. The complete basic rules are currently free, with two commercial campaign settings available for it. |