Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Galarm - Social alarm clock and reminders
Calm - Calm.com can help you reduce stress and increase calm.
Digital Clock 4 - Beautiful customizable clock with plugins
Pacifica - Stress and anxiety relief through beautiful CBT tools