Alternate Realities
A generic modular copylefted system.

CARDS
Playing card-bases system. Random quest generator, anime/manga supplements.

Chronos
Percentile-bases system, also in French.

CORE
This system is an attempt to combine the best elements of AD&D, GURPS and HERO.

Cyno's Roleplay
Randomly-rolled character generation, clunky page layout.

DCS
D20 point-based creation system with Hârn conversion notes.

Delta
Decent diceless system, and an exercise in English as a second language.

Description-Based RPG
Some interesting concepts from Chameleon Eclectic.

FFRE
Free Fantasy Roleplaying Engine, and the basis of OPES, a roguelike game.

The Fourth Conjunction
"..an attempting to create the ultimate RPG by asking the general gaming community to assist."

FUDGE
Steffan O'Sullivan's excellent and legendary Freeform Universal Donated Gaming Engine.

Fuzion
The bastard child of HERO and INTERLOK. Pretty pictures.

GAME
Greatly Abbreviated Mechanics, Etc. Very rules-lite system.

Game Engine Manual
Hosted on RPGnet, has it's own mailing list.

Gestalt
Nice graphics, annoying MIDI, no actual game available yet.

GiRGAB Storytelling 20
A free universal dicelight role-playing system, also in Italian.

GRAPE
Generic Roleplaying All Purpose Engine As rules-lite as they get.

GURPS Lite
A cut-down version of Steve Jackson Games' Generic Universal Role Playings System.

The Guide to Adventure
An 11MB download in WordPerfect format.

HYPeR
"...a very complex set of rules and this module only supplies the basic rules."

Infinite Horizons
Well-supported system with several supplements and character maker software.

Lucky 13 / Universe 13
"...the system is fast, orthogonal, easy to understand..." Orthogonal???

No Points Heroes
"Its intention is to replace complicated rules with very easy ones." Diced or diceless.

One Brain Cell RPG Rules
Rules-lite d6-based system.

OPIGS
One Page GamIng System, most of that page is charts and tables.

Oroborus
Preview version of Ragnarok Press' soon-to-be published game.

In Media Res
Formerly known as Synergy, formerly Paradigm Lite...

Paradox
Very simulationist, basic rulebook, advanced rulebook, and character design software.

Pathways
$10 shareware, system remeniscent of Big Eyes Small Mouth

Plain Label
Plaid Rabbit wants YOU to use this system to develop new and original game worlds, so they can publish them.

PLUS
Players Levels Utility System, dice-pool based with Space: 1889 and Skyrealms of Jorune conversions.

Prism
Character-heavy, bring your own combat rules, Rolemaster influenced.

QED
Quick Easy Dirty. That sums it up.

RIP
'Handles' for characters and creatures. "Actual game system is inside the gamemaster's head."

Risus
The "Anything RPG" by GURPS guru S. John Ross.

SAGA
Simple And Generic Adventures. Straight-forward dice-pool system.

Shadow Bindings
"Who Ever Said A Multi-Genre RPG Mechanic had to Be Generic and Bland??" A lot of support and supplements.

Sherpa
Another Steffan O'Sullivan production, designed to be played while walking or hiking, using a chronometer instead of dice or cards.

SLUG
Simple, Laid-back Universal Game. Another Steffan O'Sullivan production.

SORD 6th Edition
System Of Role Development, well developed with a lot of support.

SURGE
Simple Universal Relative Gaming Environment, "all the elegance of a point distribution system without the cumbersome math"

System DL
"Einstein once said, God doesn't play dice with the Universe". Yup, diceless.

Through the Looking Glass
Aaaargh! This background must die!!!

Toaster RPG
"..the toaster... is a good model for simplicity of concept and design."

TUGS
The Universal Game System. "I picked rules I liked from different games and melted them into a realistic... but still simple game system".

The Window
"the Window is more a system of philosophy than a system of rules"