ownCloud is a free and opensource file sync and share app which is self hosted.

Zero BS CRM is a Customer Relationship Management Plugin which runs on the WordPress CMS.

Blink is the best real-time communications client using the SIP protocol.

Vosae is an invoicing, organizer, contacts app.

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

SugarCRM is a customer relationship management (CRM) system.

Freshsales is a full-fledged Sales CRM software for Business.

Revamp CRM helps you make business workflow easier with its dynamic segmentation, sales and marketing automation engine