Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.

Dooinwell - Look after an elderly parent without invading their privacy

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.

CheckinBee - Automatic daily check-ins, remain independent but not alone

Talalarmo - Minimalistic android alarm

OnGuardHelp - Travel & Location