From Thomas Bley
Simple Groupware & Content Management System is a complete open source enterprise groupware offering email, calendaring, contacts, tasks, document management, synchronization with cell phones and Outlook, full-text search and many more.
Simple Groupware combines standards like RSS, iCalendar, vCard, IMAP, POP3, SMTP, CIFS, CSV, WebDAV, LDAP and SyncML under one platform.
Simple Groupware features the latest aspects concerning collaboration, document management, event-driven notification, information sharing, knowledge management, helpdesk and customer relationship management, accounting and project management. Simple Groupware is a free groupware written in PHP.
Unlike other PHP or Java groupware applications, Simple Groupware contains the programming language sgsML to enable the quick customization and creation of powerful web applications. Simple Groupware is Free Software, released under the GNU GPLv2 License.
Simple Groupware Solutions is a small German one-man company, founded in September 2003. The business domain is focused on individual services and software development. Simple Groupware is developed in my free time and offered to you for free.
* multi-user content management
* knowledge management