Just hours after iOS 6 was officially released to the public, the number of Passbook compatible apps is growing.

For users new to iOS 6, Passbook allows iPhone users to store various tickets, boarding passes, gift cards, and more in one place. If you’re a Mac user, the new OS X 10.8.2 update also allows you to send passes to the feature through Safari or Mail on your machine.

If you’re a baseball fan, MLB.com at Bat has new Passbook delivery options for game ticket purchases. Supported ballparks are AT&T Park in San Francisco, Citi Field in New York, Fenway Park in Boston, and Kauffman Stadium in Kansas City. The app is free. There are other in-app purchase options for a subscription to live game feeds and information.

The free Ticketmaster and Live Nation apps now both support Passbook for select venues.

Walgreen’s free app now offers Passbook integration for the company’s Balance Rewards program.

If you fly Lufthansa, you can use the free iPhone app to download boarding passes directly into Passbook.

And for movie lovers, the free Fandango app allows you to send and store your mobile tickets in Passbook and breeze into the theater.

Canadian theater chain Cineplex is also offering Passbook integration with its no-cost app.

We’ll keep an eye on the App Store and let you know about the growing number of Passbook compatible apps soon. As pictured, Apple has touted Passbook integration from Starbucks, American Airlines, Target, Sheraton, W Hotels, and its own Retail Store app. But updates to those apps with the integration have yet to appear.