1)   GooSync Google Calendar Sync 1.0
Synchronize your Google Calendar with your PDA or mobile device for Free. Just register for the free service at www.GooSync.com. It's quick and simple, sign-up and start syncing. Never be without your vital calendar information again!

 2)   RedBox Organizer 7.0
Get control of your schedule with this PIM. "I love my RedBox Organizer. It has everything I need for a personal organizer!" - CNET

 3)   TeamCalendar 1.125
World Premiere. Smartphone & Pocket PC users throughout the world can now bring their "virtual secretary" along while they are on the move. HandStep is launching an intuitive program that enables mobile co-workers to schedule meetings on the spot