iOS 8.1 – iOS 8 Jailbreak. http://snapvoip.blogspot.com/
The jailbreak for iOS 8 and iOS 8.1 was released by a team of Chinese jailbreak developers known as Pangu. Pangu is not your normal Jailbreak source and be warned that it is coming from China. Pangu could be used to jailbreakfollowing iOS 8 and iOS 8.1 devices;
- iPhone 6, iPhone 6 Plus, iPhone 5s, iPhone 5c, iPhone 5, iPhone 4S
- iPad Air, iPad 4, iPad 3, iPad 2
- iPad mini, Retina iPad mini
- iPod touch 5G
Settings -> General -> Passcode Lock On -> Turn Passcode Off and if you did not know that, it might be better for you to learn a bit more about jailbreaking. Next thing to do is to take a backup of your device before going forward. Jailbreaking might lead to lost warranty so recognize the risk.
Download Pangu from here
once you have this ready you can follow the instruction on this video. If you need more information, follow the link after the jump.
More info on the jailbreak.