Yakk is a web-based collaboration tool for teams, accessible from any device. In addition it does not store sensitive data in the cloud: Yakk is installed in your network so all data is stored securely inside your own network and managed automatically by the application. Users join and create channels to house discussions, files, documents, videos etc. Private channels allow for sensitive information to be kept private. It's is also a project management system: Straightforward enough to be used for the simplest of projects as well as putting people in space. All access is transparently and securely managed behind the scenes by Active Directory.
via BetaList http://bitly.com/1TXU6ca
by Robert Hughey (Google+)