hub - The Hub is a versatile intranet portal and collaboration solution that boosts employee engagement and productivity in a digital workplace.
Communifire - Enterprise Social Collaboration Software
Whaller - Create your own free and unlimited private social networks.
Bonzai Intranet - Bonzai is an intranet platform with flexible pre-built features for SharePoint and Office 365.
Jawger - Family-friendly social network for the privacy conscious
Hallo App - A private social network for your friends