Wow, I got this much reply...
Yes, Tor is also a good one, but I had a bad experience with it since lots of its IP are in Euro, not in US. I think that's because the main user of it are in Euro now, and sometime it really lags.. and can't stay with it :(
I guess there are many alternative programs in US now and you may want to check one or two. Cause it's really convenient to work on it.
Happy New Year everybody  | 
