Here are just a few of my favorite apps

abc player
netflix
goby (find cool stuff near you, restaurants, things to do...)
pandora
kindle
fox news
fwix (local news)
weather channel
hulu plus (still waiting on invite)
abc news (new)
e online
nutrisystem
google earth
stumble upon
beat the traffic
free translator
5-0 radio (police scanner)
twitter
bloomberg
epicurious
food network
web md
womens health
craigs phone
appstream (new helps you find new apps)

All these are free expect hulu plus will charge you about $10 a month to use the plus service, right now for me it's free but limited to what I can watch.