I've always enjoyed Pocket on my mobile devices and now that it's on the Mac I'm loving it even more. The interface is super minimal without any bells and whistles, but that's a positive as it keeps content as the main focus. You can of course share articles to social networks, view web versions and tag posts just like in the mobile apps.
If you're new to Pocket, it's a service that allows you to read/watch things later by adding the content to your Pocket applications. It's super useful for me, especially when I'm on short journeys and don't enough time to finish reading something. You'll find more info and with links to the Mac app as well as the various mobile versions here.