Ask HN: Just ordered my first Mac- what apps should I know about?

Getting my new Macbook Air on Wednesday. I'll be using it for RoR and front end coding (not a dev but trying to move away from/add to the "Product Guy" label), VM (will run Ubuntu in a VM).

So far these are the apps I know about:

-Adium to combine all my chat accounts

-Growl for notifications

-iTerm2 seems to be an interesting terminal emulator

-Any Notepad++ equivalents on OSx? (I'll end up using Vim and some Notepad++ equivalent)

-Recommended email clients?

-Recommended media players? (I use VLC on Windows)

-Recommended calendar apps to sync with Google and Exchange calendars?

-CSS editors?

-Anything else that a Mac newbie should be told about?

Thanks.