Task Boards for Kanban
Kerika makes it easy for distributed teams to work Kanban-style.
Every Kerika user has a unique URL that can be used to synch with his or her calendar: don't share this URL with anyone!
You can control how fast Apple, Microsoft or Google may pick up these changes from Kerika: here, for example, is you can make sure your Apple Calendar picks up changes from Kerika fairly quickly: