Koko is a social network for your mind. A snippet from the website below about the app:
Based on research from the MIT Media Lab, Koko uses an innovative form of crowdsourced cognitive therapy.
Wired did a great write up about it.
I have been beta-testing this app since someone kindly pinged me on Twitter. It is quite unique and address mental health issues like stress, depression, anxiety, or whatever is the case. Something that clearly fits for us people who are working towards a better mental health.
I have to say it is wonderful helping strangers because the idea of helping some random person on this world helps them and it helps you to mentally shape things for the better. Don't worry, it is all completely anonymous.
Grab it for free via App Store. An Android version is in the works, sign up to their mailing list.