Oliver Schmidt has released Contiki v1.2, which is the first public outing on the Apple II. Contiki is an open-source, multi-platform, low memory footprint, networked operating system. It runs on Apple IIs as far back as the II+.
The Apple II version contains an email client (send only at present), web browser, FTP client (download only at present), DHCP client, TELNET client, web downloader, IRC client and more. A user guide also is available.