Muddleftpd

FTP servers tend to always want root access to do even the most basic
stuff. This ftp server was designed to overcome this limit without
limiting the access protection and safety of a regular ftp server.
This ftp server can operate as a replacement for wu-ftpd, or it can
operate under a single uid, running without any knowledge of the system
password file. Anonymous access is availible too and you can actualy create
as many guest accounts you like with same or different properties.
To do this, it has full access settings per user. You can give permissions
for particular directories or files.
This server is also secure without being overly intrusive. Unlike wu-ftpd
and many others, it doesn't do a chroot anywhere. It manages directories
internally in a secure and fast way. This means the server doesn't need to
run as root. Also since it doesn't ever run external programs, if the server
does crash, the user won't be given any privliged access.