HootSuite is a free social networking and micro-blogging web service that enables users to post to multiple social networks simultaneously, eliminating the need for individuals to update it in all their social media networks individually.
HootSuite also provides the following features:
Organize social business in teams and networks
Communication allowing internal communication within the tool
For more sophisticated features you can choose from the Pro plan for $9.00 per month or Enterprise plan. For more information on pricing visit: http://hootsuite.com/plans