is an online address book and calendar manager that can synchronize your information between Outlook, Google, Yahoo!, AIM, your Apple apps and more. Today they released version 3.0 which includes a number of improvements, like:
- Google Calendar synchronization
- Calender "countdowns" to important events
- Improved reminders
Best of all, Plaxo is free. It's still in beta, so take that into consideration before you try it out.