Some freebies I've downloaded:

SHOUTcast radio (a multitude of AOL streaming internet radio stations - awesome)
CBC Radio (CBC 1, 2 & 3)
The Atlantic
MSNBC
Time
Huff Po
Virtual Zippo Lighter (fun)
iHandy Level
Shazam (music recognition - listen and identify song)
Lightsaber Unleashed (a must for Xianti)
Weather Eye (The Weather Network)