What's a good program to jailbreak my iphone with?

I have an iPhone 5 & I want to use a different font & do some cool *** to it! With a bunch of extras of course.
So, does anyone know a SAFE & awesome jailbreak for the iPhone 5?

Greenpois0n

Greenp0ison is old. Try Evasi0n (evasi0n.com)

No jailbreak is 100% safe, but try

http://www.gizmag.com/jailbreak-guide-iphone-5-ipad-4-ipad-mini-untethered-ios-6-1/25995/