Uxcel - The easiest way to learn UX/UI design
Timezone.io - Keep track where and when your team is.
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
Time Zone Pro - A beautiful world clock for friends, family, clients and more
UX Challenges - Done reading about UX? Start doing it.
Spacetime - Work hour and time zone management for distributed teams.