This link will take you to the Apple support site and covers all of the iWork and iLife Mac apps along with some other built in Mac apps.

This Apple site shows you the basics of a Mac, how to connect accessories, how to do on a Mac what you have done on a PC, and many other features of the MacBook.  Look down at the bottom of the list on the page and be sure to check out the "Switching PC Habits" page.

A great article with different resources and links to help those who are new to MacBooks.