from the introduction:
EZ20 is a free, simple, open content, introductory roleplaying system designed to be accessible to hobby newcomers while also appealing to older gamers who seek a less complex rule set that they can more easily fit into their busy day to day schedule.
EZ20 isn't a stripped down d20, so much as it is a simple game system intended for hobby newcomers. Excess fiddly bits and a narrow focus on simulation (of reality or anything else) don't make for great introductory RPGs, so I've tried to avoid them in EZ20.
(from a post on Story-games.com)