To find free stuff from the homepage on Craigslist.org, navigate to a local Craigslist page; under the For Sale heading, click the Free link. This link takes you to a search page that displays privately listed items that are offered for free.
Aside from generosity, people have several practical reasons for listing items for free. Such items are often large and therefore easier to leave outside for pickup than to transport to a dumpster. However, sometimes it is an item that the owner feels would be more useful to someone else and may be too difficult or time-consuming to sell.