I'm just about to open up the Elthos RPG for an expanded Beta Test, and would welcome interested GMs who are looking for a medium-light weight RPG with low number math and extensive computer support in the form of The Mythos Machine - a fully integrated browser based GM Game Prep Utility that uses the Elthos RPG Rules System.  The purpose of the system is to have the computer handle as much of the grunt work as possible, without taking over the creative aspects of game play or world design.  The system allows the GM to create their own Worlds of any genre they can imagine, and fill them with their own Things (Weapons, Armor, Equipment, Races, Classes, etc, etc).   It does All of the the math for the entire rules system including calculating Attack Levels and Armor Classes, Experience Gains, Combat Matrixes, and pretty much every necessary GM calculation I've needed in the past 30 years of play.  

It also features a World Weaver's Studio which allows you to create your World, and the Places in your World in a hierarchical tree (ie - Continents which have regions, then cities or villages, etc.), and then associate Campaigns of your creation to those places, and Adventures of your creation to your Campaigns.  It's a fully featured system.  Its been beta tested among friends between 2009 and 2013 and is reasonably stable, and tremendously useful.  It can be used on conjunction with other systems as the Elthos ODS (One Die System) RPG is a very small RPG which can easily be used to scale up and out to other systems.   It can also be used in conjunction with online virtual tabletop software such as Roll20.  

If you would like to read a Review by Mark Knights of the system, you are welcome to look here:  http://rpgknights.com/elthos-rpg-more-than-meets-the-eye/.

If you would like to check out the Open Beta you may go to http://www.elthos.com and create a free beta login, download the rules book, and play around with the Mythos Machine.  The World Weaver Studio is system neutral and can be used without the Elthos Rules, and the GM section is Elthos RPG specific, yet is genre-neutral, generic and extensible to other systems, potentially.   Please provide feedback if you observe any issues (usability, bugs, etc), or have recommendations!   Thanks!

The Elthos RPG Mythos Machine Open Beta is going well and we are adding new logins steadily.  If you are interested in reading a review of the system please check out http://rpgknights.com/elthos-rpg-more-than-meets-the-eye/ by Mark Knights.  If you want to join the Open Beta you may go to http://elthos.com and register a free account for yourself.  From there you may download the rules book for free and explore the Mythos Machine GM Game Prep Utility at your leisure.  We are looking for feedback so if you run into any problems with the site, or have recommendations please use the Feedback feature on the website, or post your thoughts here.  Thanks!