Dingo is a CalDAV* compatible server using MySQL, written
in Perl as a CGI script. The installation assumes RedHat Linux and Apache,
but can probably be adapted for other systems.
Dingo has been tested with
Mozilla Sunbird
and Lightning
versions 0.5, 0.7, 0.8pre as clients.
Authentication is via HTTP Basic (e.g. mod_ldap) or Digest in Apache.