- Bit.ly - shortening and sharing links
- Delicious – social bookmarking service
- Digg- Top news, videos and pictures on the web as voted on by the Digg community.
- Reddit - User-generated news links. Votes promote stories to the front page.
- StumbleUpon – “takes you to web pages, photos, and videos handpicked by your friends and like-minded people.”
- How to Break Through the Clutter on Social Media [Marketing Cast] from HubSpot