Look for OpenBroadcastSoftware or OBS. Its free, and works beautifully on my JW. You will need a twitch account though, im sure you knew that. The twitch site has guides to set up OBS properly to get the most out of it. Do a search , you should find it.
nVidias Shadowplay with GeForce Experience isnt bad either, as long as youre not streaming a blizzard game (doesnt support windowed deskctop capture, only game capture, and you have to be in full screen). Also no overlays with it.