Teamup is a calendar tool but different from most other calendars: It offers many more ways to organize information than showing who, when and where for events: With easy-to-scale sub-calendars, custom fields, file attachments, unique calendar views and customizable access permissions, Teamup helps create more clarity for calendar events and make it easy to visualize big pictures, yet it is a simple calendar and easy to use. The option to share calendars and events without user accounts eliminates unnecessary barriers for groups to communicate and stay informed.