Small business intranet

I am looking for an intranet solution for a small business. These are some of the requirements but we can fine tune them as needed. I am also open to an open source solution with some customization as long as the developer will provide the support needed to setup, configure and ensure the application is working smoothly. Nonfunctional requirements: Secure Easy to use Easy to maintain Easy to update Interactive Support The major objectives for this interaction are to: 1) ensure teams are kept up-to-date developments within the firm in a timely fashion 2) eliminate information asymmetry especially occasioned by the multiple geographical locations- our most active office away from Head office is the miles away and they need a lot of support from head office as they grow 3) share knowledge and expertise on the emerging industry developments 4) strengthen our business development initiatives through deepening of information sharing 5) create a secure social media for sharing fun and any other social interactions that meet the required and authorized content 6) build stronger teams which have a sense of oneness even with the geographical boundaries 7) allow efficient resource mobilization across the organization once we require such resources at very short notice. 8) allow free interaction in any other form to achieve work-life balance whilst achieving the Firm’s business objectives. Sample features: Single sign on Searchable Employee directory File sharing and management Shared calendars Human resource chores – time tracking, vacation, etc Real-time chat