5.1.1 Firmware

PC, greenpois0n :
http://greenpois0n.com/

5.0.1 Firmware

4s, PC, greenpois0n :
http://greenpois0n.com/

3G, PC, redsn0w :
http://www.redmondpie.com/jailbreak-5.0.1-untethered-on-iphone-ipad-ipod-touch-a4-devices-now-using
-redsn0w-0.9.10b1-corona/

4.3.2 Firmware

3G, PC, redsn0w :
http://www.redmondpie.com/iphone-4-4.3.2-jailbreak-using-redsn0w-on-windows-mac/

4.3.1 Firmware

3G, PC, redsn0w :
http://www.redmondpie.com/jailbreak-ios-4.3.1-untethered-iphone-4-
3gs-ipad-ipod-touch-with-redsn0w-0.9.6-how-to-guide/

2.2.1 Firmware

3G, PC, QuickPwn : http://iphone4.tw/forums/showthread.php?t=34146