Android Central, MightyText, Chrome Browser, GMAIL, Outlook, Email, Play Store, Play Games, Play Music, and Zoom Camera for starters. I like the Hangouts app on my N4 since the update......here's hoping some day I can use it likewise on the N7.
Dang...can't believe I left out YouTube. On the business side.......Evernote, Dropbox, Drive, and QuickOffice.