Future Me - Send an email to your future self
Thyself - Mindful mood tracking for greater self-awareness
Letter to Yourself - Send a physical letter to your future self
NOISESUPPLY - Pandora for SoundCloud
Letter to my future self - Letter to my future self is a prominent email scheduling service that gives you the opportunity to create a letter with goals and thoughts for your future self and schedule a date for sending it.
Moodflow - Moodflow app offers features that let you track your mood, emotions, and thoughts so you can have deeper knowledge about yourself.