Elgg allows companies to utilize a social media channel directly on-site for their employees.
Elgg is an Open Source social networking platform. It offers many of the same concepts as a system like Facebook only in a format that allows you to run it on-premise within your organization.
Application Version: Elgg 1.8.19
JumpBox Version: 1.8.1
Minimum Requirements: 1 vCPU (up to 4 supported) 512MB RAM
Support for this appliance is available via the JumpBox Community: http://www.jumpbox.com/forums