FathomDb
http://fathomdb.com/about/home
FathomDB is the easiest and best way to run a database on EC2
* Database-as-a-service: pay only for what you use, no up-front costs
* Relational: standard databases like MySQL means nothing to rewrite or re-learn
* Managed: we do the setup, backups and monitoring
* Designed for EC2: out-of-the-box best practice for databases in the cloud
* Deep insight: track and improve performance down to the query level
