iCal 3.10   
by Brown Bear Software   

iCal is a web calendar server. Anyone with a web browsers can access the calendars on their local Intranet or Internet. Any number of calendars can be created and accessed by any number of users. Security controls who can make calendar entries. Features include rolling up subordinate calendars into a master calendar. The ability to define the appearance of the calendar: colors, fonts, titles, headers etc. Multiple languages are supported.