Busy Apps Help

BusyCal Mac - Using BusyCal with CalDAV

CalDAV is an industry standard for calendar servers. BusyCal can connect to CalDAV servers, using them to sync calendars across your devices and share them with others.
BusyContacts Mac - Using BusyContacts with CardDAV

CardDAV is an industry standard for contact servers. BusyContacts can connect to CardDAV servers, using them to sync contacts across your devices.