About insightly

Insightly is a web-based project and Customer Relationship Management (CRM) application that integrates with Google Apps via a Gmail contextual gadget and Google Docs support.
Unique to Insightly is the concept of "linking": any element in the system can be associated with another element: projects, tasks, contacts, organizations, events, emails, opportunities.
The link describes the role. For example, contacts can be associated with other contacts as "colleague", "was referred to / referred" etc., or as a custom relationship. Tasks cannot be associated with tasks, and Insightly lacks task dependencies or Gantt charts. A task can be linked to multiple projects via the "Link" feature, but there is no drag-and-drop. Tasks can only be assigned to one Insightly user, and cannot have a start or due time (only a date). Insightly, however, support events, where the time can be set.