Change IP Software

Can anyone recommend me a software that allowed me to change to another proxy ip?...thanks...

why don't you just manually find a good proxy and then use it? Proxys are kinda useless unless you're trying to get into a place where you are banned.

Tor.

http://tor.eff.org

http://www.anonymizer.com

http://proxy.cjb.net

Or if you're looking to just get into specific sites (I really don't like messing with proxy's, can cause problems, and some are very unreliable), use this site;

http://anonymouse.org/anonwww.html

CookieCop from PC Magazine, however it's not freeware. It can also block cookies and sites for example from ad servers.