But when a group of people make a product for themselves because they
need it, and aren't interested in turning it into a business, you can
get a good thing for free. Of course, this wouldn't have worked in the
1800's, when there weren't really any products that a person could give
away at no significant cost to themselves. But now software is such a
thing. Clam Antivirus (
http://www.clamav.net) is such a
community-created piece of software. It is free and freely
redistributable and alterable under the GNU General Public License, and
many major companies (Macintosh included) trust it.