Yammer is an enterprise social networking tool that offers both free and paid for services. You register using your companies unique email address. It is pretty much a private Facebook for your company – with all the social networking features you could want. It is used by 80% of the Fortune 500 companies and top clients include the BBC, Groupon and Barclaycard.

Yammer saves time and increases productivity, encourages spontaneous real time conversations, connects people within the organization and encourages the sharing of new ideas. The Facebook-like layout also means that people intuitively know how to use and navigate around the site.

A recent poll of 10,000 Yammer users has turned out some positive results for the company: