I ran across blockstack recently and was wondering if it fit the bill. It seems like Solid minus the linked data stuff. The user keeps control of their own data just like with Solid. They have some initial apps listed here: https://app.co/blockstack

In comparison, here's a list of some Solid apps: https://github.com/solid/solid-apps

But blockstack also has a cryptotoken: https://news.ycombinator.com/item?id=20413420