OneNote is pretty great. It uses SkyDrive, but is available for free on most mobile platforms (Iphone,Android,Win8 Phone) and any platform with a moderately up

OneNote is pretty great. It uses SkyDrive, but is available for free on most mobile platforms (Iphone,Android,Win8 Phone) and any platform with a moderately up to date browser. (Via the web app on Skydrive)