Here is a short and on-going list of my favorite, most-used AIR applications.
TweetDeck
Anyone who tweets is probably familiar with this app. It’s simply an amazing way to create and manage tweets.

ShareFire
Great XML reader/manager. Entries can be viewed as HTML using the in-built browser. Import/export functionality keeps you somewhat synced.

Doc? Local Live Docs
I constantly use the Actionscript 3.0 Language and Component Reference and this app allows me to keep it readily available. There are also plugins for Eclipse and Flash that allow you to easily access the app.

