Is there any bitcoin fork which goal is storing arbitrary information? I know that there is Namecoin, which saves key:value pair.
Is thete other similar solutions?
Maybe for arbitrary textblocks?

Update: how they do it? 
Delaware Blockchain Initiative to Streamline Record-Keeping for Private Companies
http://flip.it/wqxKJ
Storj is a blockchain based solution for encrypting and storing data. More information can be found about the project at storj.io