My top free apps for Android
Pandora-This is the free streaming music site.
Aldiko ebook reader-I'm glad I returned my Kindle. Now reading The Cathedral and the Bazaar.
AK Notepad- it's easy to copy and paste from any source, and then share it via e-mail.
Battery Widget- gives percentage of battery life (important for the HTC Hero), and buttons for adjusting display, Wi-Fi, GPS and Bluetooth.
Listen- app for managing webcasts either by streaming or downloads.
Bonsai Blast- fantastic game with great graphics and music. It's a sort of shooting colored balls at other colored balls in a frenetic manner, but the experience is very relaxing overall.
UPDATE: Twidroid & FriendFeed Post & Upload