Tungle.me is the first stand alone calendar app for the BlackBerry Playbook, now available in the Blackberry App World. It supports Outlook, Google Calendar, Apple iCal, Entourage for Mac, Lotus Notes, Yahoo! and Windows Live. The only downside, is that you are only able to view your calendar, editing is not supported on the Playbook. You can sign up for account at Tungle.me.com.