Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Go Fucking Work - Website blocker so you can get back to your fucking work
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.
UnDistracted App - Use social media in a useful way. Control Facebook, YouTube, Twitter, Reddit, Netflix and LinkedIn in a responsible way.
Alarm Klock - A better alarm clock.
CUBI - See your life in weeks