HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful. It's lightweight, powerful and comes with an user-friendly interface. Create your own customized social network, social intranet or huge social enterprise application that really fits your needs.
Limited extensions or plugins available. Some custom programming may be necessary.
User-friendly and easy to use, and offers easy management of content and data, with a minimal learning curve. No prommaning knowledge is necessary.
Has a smaller active community. Limited support is available either for free or as a paid service. Adequate documentation is available.