Google Calendar - Spend less time managing your day & more time enjoying it
Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.
Calendar Lock PEA - Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.
Online Alarm Clock - The world's original online alarm clock, established in 2006.