
Atollon Lagoon
The most modern productivity & collaboration seamlessly integrated with CRM, easily customizable to organization requirements, whose main business activity is professional services or project management.
Group-Office is an enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients. Easy to use and fully customizable.
Open source free community version features : Email, Calendar, File sharing, Address book, Tasks, Notes, Newsletters.PHP based.
Very simple to install and update in Debian 8.x
Productivity Online Services File Sharing
file-sharing webmail-service calendar online-editing