As some of you will have seen, Twitch has sold their addon updating to Overwolf. Eventually, the Twitch client won't update addons for you, something from Overwolf will. It's still being developed, so no one knows what it will look like, but there is a lot of unhappiness with other things that Overwolf has done in the past.
I have seen two other programs for updating addons: if you are willing to just use the ones on WoWInterface (which is most of the popular ones), they have an addon management program called Minion that you can find on their web site.
If you want to stick to CurseForge, in addition to whatever Overwolf brings out there is CurseBreaker:
I have not used it yet myself, I'm going to wait and see what Overwolf brings out...but I am tempted. )