Satscape - A satellite tracking program for Windows, Mac OS and Linux.
Timezone.io - Keep track where and when your team is.
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Time Zone Pro - A beautiful world clock for friends, family, clients and more
Orbitron - Orbitron - Satellite Tracking System written by Sebastian Stoff.
Spacetime - Work hour and time zone management for distributed teams.