MultiSchedule

Networking calendars
MultiSchedule is a calendar software application that can be used on a network or on just one computer.

Multiple users can use multiple computers to input/view/edit calendar events simultaneously in real time. All data are stored on a central server/computer. No dedicated server/computer is needed. The client side software can coexist with the server side software on one computer. It works for both Peer-to-Peer network and Client/Server network.
Connect to the calendar server through Internet
If you have a server that is accessible over the Internet, MultiSchedule will be able to connect to the server over the Internet! We recommend that you use a DSL/ADSL or Cable modem to connect to the server if you are connecting to it over Internet to get the best result. If you don't have a server you can use the "Hosted" version of MultiSchedule and we will take care of your database on our servers which have a super fast connection. This way you don't have to bother about your calendar data, you will be able to access it on every computer that has Internet access.
Synchronize with MS Outlook
MultiSchedule is able to do two-way synchronization with MS Outlook. This way you can synchronize your calendar with your MS Outlook, without having to buy an extremely expensive MS Exchange Server. From MS Outlook you can Sync again to your PDA with your standard PDA-sync-software.

Custom appointment / task properties
Customizable appointment / task properties. Set up your own appointment and task properties. You can organize your appointments with these custom properties. For example: You add a custom field Invoiced or Paid to your calendar-items. This way you can check if an appointment has been paid for or has been invoiced already.