Two online tools to help you manage schedules when everyone isn’t on the same calendar system:
Meeting Agent (setmeeting.com; free): Useful if you need to arrange a meeting with people from different companies or coordinate community volunteers. Since it’s web-based, you can log in from anywhere, anytime.
Shiftboard (shiftboard.com; rates vary depending on business size): Useful for coordinating schedules for shift workers or for a group of volunteers whose schedules change each week. Assign shifts, or let workers choose their own.