That humble household appliance, the toaster, is a good model for simplicity of concept and design. Toasters have one basic function, a simple user-interface, and so long as you don't try to shove anything too large in it, they are generally very reliable. Toaster is also a humble roleplaying game built around a few basic concepts and mechanics, using simple math and die rolling, and it can handle most genres and settings with no difficulty.
Superhero Character Creation: Guidelines and hints on creating characters for superhero campaigns.
San Angelo Sentinels: A superhero campaign background in which superheros are celebrities not unlike superstar athletes and superhero teams are structured and managed not unlike professional sports franchises.
I am a Roleplayer: An essay/rant on roleplaying and what it means to me.
Ironclaw: Review and analysis of this anthropomorphic fantasy roleplaying game.
20d6: A spreadsheet showing the distribution of 1d6 through 20d6 plus some modifiers (+1, +2, and +d3).