Scoop It: Discover, curate, and publish extraordinary content to get visibility online.
Buffer: It does many things but became famous for making it super easy to share any page you’re reading.
Paper.li: Publish Twitter, Facebook, or any web content into your own online newspaper.
Twittimer: Schedule Facebook and Twitter updates.
Quuu: Works closely with Buffer and allows you to curate content to grow a relevant social media following across your networks.
Curator: A tool for the whole creative process that goes from idea to presentation.
Later: Social curation tool that helps save a lot of time.