Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!

Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Tribe.so - Tribe is a white-label platform, empowering the new generation of online communities.

LinkedIn Premium - LinkedIn is a social network helping brands and professionals to connect, identify sales prospects, hire talent, and promote their business.

Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.