Android/iOS: Most calendar apps can manage your schedule just fine, but if you deal with multiple time zones, it's easy to get mixed up. Time Buddy helps you plot your day-to-day when you have to traverse the world.
Time Buddy lets you set one time zone as your "home" and displays your schedule around it. You then add any other time zones that are relevant to your schedule. This can be useful if you work remotely, are travelling, or need to coordinate with long-distance family and friends.
You can see at a glance what time it will be in another time zone while you go to your events. For anyone who frequently deals with events all over the world, the visualisation is a huge help.
Time Buddy [iTunes App Store]