Doodle Poll allows you to schedule a meeting with your group and even works when scheduling between different time-zones. It works with most calendar services such as MS Outlook, Google Calendar, Yahoo! Calendar, and more. Simple design and user-friendly. Free accounts available.
Watch the video for a quick walk-through of how Doodle Poll works:
Slack: Stay on the same page and make decisions faster by bringing all of your work communication into one place.
This video provides a quick overview of how Slack works.
TimeBridge is another scheduling software which works in any time-zone and with many calendar services such as MS Outlook, Google Calendar, and more. Free accounts available.
Watch the video for a quick walk-through of how Timebridge works: