Myxer.com its very very easy to get free ringtones from there. and its not one of those places here you get like 5 free ringtones then they charge you, its unlimited and ALWAYS free. you can also get free wallpapers from there. but anyway ive gotten many free ringtones from there. trust me this is the best site, you can even crate your own ringtone or change to the part of the song you want for your ringtone.
www.tonzr.com
It has unlimited free ringtones just make sure you switch the message type to pic message. I use it all the time and its very safe and reliable! =] Hope i helped!