ProKal is a network-compatible organizer and calendar-program. The calendars for multiple users can be displayed simultaneously next to each other. ProKal has a Web-Interface, a synchronization via e-mail and can synchronize with Palm-Handhelds.

Note: One calendar may be used without any limitations and for free (including web-interface and synchronization). Entries in other calendars are displayed only on the current day, day before, and after it.