uftpd is a small, no nonsense FTP server with no confusing configuration files and security features you don't need. It serves files from /srv/ftp on port 21 by default and just works.
MetaFTPD is an FTP server/proxy with many features, including "MODE Z" compressed file transfers, file locking, chrooting, data-connection/firewall scripts, XSHA and XMD5 commands, and transparent proxying.
A Dart Web server.
A PHP/MySQL tile engine for Google Maps.