Marvin Minsky's book draft for The Emotion Machine. Chapter 6 is about Common Sense.
The CYC project at Doug Lenat's Cycorp, including Open Cyc.
Push Singh's Open Mind publicly accessible common sense knowledge base.
A collection of references to research that uses Open Mind.
Eric Mueller's Thought Treasure
Leora Morgenstern's Common Sense Problem Page.
Conference on Logical Formalizations of Common Sense Reasoning, 2001.
Reading List for this year's Media Lab/AI Lab Common Sense Reading Group.
Resource List from last year's Common Sense Reading Group.
To suggest new resources for this list, mail to hugo@media.mit.edu.