What's the best software to keep an iPhone calendar in sync?

I'd like a Windows alternative to the software that Mac users use to sync calendars back and forth. Using Google calendars is a hassle and something software based (not web based) would be great. Thanks in advance.What's the best software to keep an iPhone calendar in sync?You can use outlook express and that will handle your calendars.What's the best software to keep an iPhone calendar in sync?Maybe you can try this: http://www.pandaapp.com/content/2008-12-鈥?/a>