Simple Groupware is free software released under the GNU General Public License.
It has modules for managing calendars, contacts, tasks, projects, and inventories of equipment.
External data can be integrated using IMAP, RSS, iCal, vCard, CSV or XML files.
Data can be exported in the CSV, XML, HTML, RSS, and iCal formats.
By reducing the amount of code, applications can be changed quickly and be more readily checked for bugs and consistency.