This list is by no means an exhaustive list for the Apple ][ related sites. It does have most of the more relevant sites on the Internet. The bottom section of the list is included because it was used by the original author of the Apple ][ Clones website.
These are links to some of the better Apple ][ related sites on the web. You can pick up a ton of great software on most of them.
Rubywand's Apple II FAQ
Vintage Computer Marketplace
Apple II Text Files
Trenco Archives -doesn't seem to be working anymore (August, 2006)