Oak Engage - Oak Engage is a digital workplace for enterprises that need to communicate with their workforce. Connect your teams. Engage your people.

Workplace by Facebook - Connect everyone in your company and turn ideas into action.

Nextcloud Hub - On-premises, enterprise collaboration solution for documents, emails, calendars and more.

Salesforce Chatter - Salesforce Chatter provides a suite of collaboration features to any application built on Force.com.

Zendo - Zendo allows you to sell productized, subscription and custom services. Collaborate and collect payments. Create quotes and invoices. Eliminate multiple tools and enjoy the simplicity.

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!