I love the shared calendars feature in Noteworthy Webmail. As a project manager for Mailtrust, a lot of what I do involves scheduling meetings with various people to discuss priorities, work out processes, and plan our work. Since we have a fairly flat leadership structure, our managers are typically in high demand and have full calendars. Trying to get several of them together at once can be quite a challenge.
The shared calendar tool enables me to view everyone's calendar at the same time. With access to everyone's calendars, I can select meeting times when all the people I need are available.
With one look, I can send out a meeting invite for the right time and lock in the mix of people I need for the task at hand.