Datomic - The fully transactional, cloud-ready, distributed database
StratusBase - StratusBase is an application designed to take the hassle out of building an online database.
MarkLogic Server - MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.
Grubba.net - The free web based online database for home and office.
Datahike - A durable datalog database adaptable for distribution.
Cellica - Read and write to your databases without any programming changes.