Gift Economy Websites

Goods
To give things away, consider the simplicity of the giveaway project. For more organised systems:

For help with dumpster diving/skipping, try http://trashwiki.org.

Transport
Main Page: Free Transport

If you're ready to keep your back to the wind, see HitchWiki, recommended to both beginners and expert hitchhikers. For something more organised, there are many websites which put drivers and travellers in touch for free.

Hospitality
Main Page: Free Hospitality

Many websites put hosts and travelers in touch for free. Although not the largest, BeWelcome.org is a legal non-profit in the spirit of the gift economy:

Information
These days, pretty much the whole internet is a gift economy. Commercial pay-per-view websites got crowded out by free alternatives :)