Exactly where are you trying to watch live streaming from? There are various formats that are use to stream live video, QuickTime, Real, WMV to name just a few.
Example sites would be good
P
I am trying to watch live sport over the internet, but to watch live streaming someone told me that i should download one of these programs:
pplive
ppstream
Sop
boiling point
tvants
I had a look around and i could not find any for MAC (OS X), i was wondering what is the best program to download (preferably freeware) that allows you to watch live streaming.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic