Dydra
Heroku-Easy Graph Database
Dydra is a Database-as-a-Service for the graph database standard, RDF. Graph databases are useful for solving a wide variety of problems, such as efficiently expressing business logic like "Other items like this one" and "Customers who bought this also bought..." RDF is the only cross-vendor graph database standard.
Dydra is an agile, frictionless way to use RDF. It's the only true cloud service for RDF.