On: Ask HN: Quit my job for a year to write open source code, what should I work on?

Open-source social networking/personal data storage with Tent: https://tent.io/

You can build any type of app you want on top of Tent.

See the hosting provider Cupcake.io to get a working Tent account: https://cupcake.io (say ^bnb.cupcake.is sent you!)

This is what I was looking for, data producers control their own data and manage the app providers to use the data..