Interesting open source project led by the University of Warwick. Its aim is to help users keep track of where information about them is stored online so that they can actually -- personally -- benefit from it. An important issue; whether this is a viable solution or not is another one...
[...] a marketing professor at the University of Warwick who led RUMPEL's development, said: "It's time for people to claim their data from the internet."
"The aim of RUMPEL is to empower users and enable them to be served by the ocean of data about them that's stored in all kinds of places online, so that it benefits them and not just the businesses and organisations that harvest it," she added.
"The strapline 'Your Data, Your Way' reflects our determination to let people lead smarter lives by bringing their digital lives back under their own control."
TechRadar article : New web browser lets you take back control of your personal data
And the GitHub RUMPEL project