Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Refined Twitter - A browser extension that improves the Twitter experience
Sleep as Android - Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.
Pillow for iOS - An iOS companion that helps you sleep better 💤
Talalarmo - Minimalistic android alarm
Do You Even List? - Auto updating Twitter list of people you interact with most