I understand you're looking for an add-on, but I do this through RSS feeds. Each node has an RSS icon next to it that provides a feed of its content. From there, I use the free service IFTTT to feed it onto our Twitter account.
It's pretty simple and I've had no troubles with it. I did have to make a recipe for each node I wanted posted to my Twitter account, since I couldn't find a way to generate an RSS feed for multiple nodes, but after I set it up once I haven't had to touch it.