ChaosSync for Palm - Provides easy transfer of address book, datebook and to do list data between any Palm and the Time and Chaos contact manager for Windows. Also allows multiple Palm users to sync with shared databases. - http://www.chaossoftware.com/chaos32-plugins-tc2palm.html
Intellisync - Synchronize your PalmPilot organizer directly with your favorite PC-based personal information management, contact management and group scheduling applications. From Puma Technology, Inc. Commercial. - http://www.pumatech.com/ce-palm_fam.html
PROFS-AutoPilot - A conduit between IBM's OfficeVision/VM (PROFS) and the 3-COM PalmPilot connected organizer, IBM WorkPad and fully compatible Connected Organizers. Commercial $59.95. - http://www.ftbsystems.com/
DataViz - Synchronization/conduits for Outlook as well as Palm OS viewers for common word processing and spreadsheet formats. - http://www.dataviz.com