Baïkal is a Lightweight CalDAV+CardDAV server. The home page is http://baikal-server.com/
Baïkal needs some PHP modules. I use Apache as web server.
pkgin in apache-2.4.6 ap24-php53-5.3.27
pkgin in php53-pdo-5.3.27
pkgin in php53-xmlrpc-5.3.27
pkgin in php53-pdo_sqlite-5.3.27 php53-pdo_mysql-5.3.27
pkgin in php53-dom-5.3.27
Now you must configure php.ini, adding the modules.
vi /opt/local/etc/php.ini
extension=xmlrpc.so
extension=pdo.so
extension=pdo_mysql.so
extension=pdo_sqlite.so
extension=mbstring.so
extension=dom.so
The rest is pretty simple, following the install guide.