Pandora, Music, NOOK Friends (Beta), Chess, Sudoku, Crossword, Contacts, Email, and Gallery.
Any others you have to get from the B&N shop.
As a side note to what Nallia said, you mentioned QuickOffice. QO is the default document viewer on the device but not a visiable app. Meaning if you open a PDF or MS Office file it will launch QO. This is a very basic document viewer and I do mean basic
However QuickOffice Pro, ezPDF, and Repligo are all nice document viewers available in the app store currently for varying fees.
Fliq Calendar is available for free in the shop, I don't recall if there are others available.