ConceptNet aims to give computers access to common-sense knowledge, the kind of information that ordinary people know but usually leave unstated.

The new version of ConceptNet, ConceptNet 5, is now maintained in a separate repository:

http://github.com/commonsense/conceptnet5/

See http://conceptnet5.media.mit.edu for more information.

If you're interested in ConceptNet, please join the conceptnet-users Google group: http://groups.google.com/group/conceptnet-users?hl=en