Zoho Connect is a social business collaboration tool from Zoho that provides a familiar Facebook/Twitter style platform for your business to allow teams to collaborate and share ideas, share documents and information and generally keep updated on what's happening in the organisation.
Zoho Connect can be used as a wiki or intranet for your business, need it is even possible to embed Zoho wiki as one of the apps within your portal for a more traditional style of pushing information to teams.
With other cool features like chat and custom apps, Zoho Connect is a scaleable social business app that is useful for small, medium and large business alike.