Moneyless projects

General, philosophical

 * Moneyless Manifesto, by Mark Boyle
 * Moneyless.info
 * http://zerocurrency.blogspot.be/

Practical

 * Hitchwiki, the hitchhiker's guide to hitchhiking
 * BeWelcome, free hospitality exchange network

Recycling

 * Trashwiki, the global dumpster diving guide
 * Bookcrossing

Food

 * Food Not Bombs