Apache Trafodion DBMS - Innovation for Big Data with SQL access to Hadoop.
Apache is going to offer a lot more than just Hadoop analytics processing, with a database that can federate OLTP and big data analytics.
Vision is the art of seeing what is invisible to others
NuoDB's latest release lets users perform operational analytics on transactional data: seeing what is otherwise invisible (without a data warehouse)
Distributing MySQL databases
ScaleBase provides the ability to distribute MySQL databases without change to existing applications.
So, what do I really think of the mainframe today?
Mainframe futures.
Is YourSQL running too slowly?
Tokutek provides an interesting alternative to sharding, SSDs or relacement databases if MySQL is running too slowly
NoSQL and NewSQL
NewSQL databases have new architectures but are designed specifically for OLTP, supporting SQL
VoltDB
VoltDB has now come to market as an open source database.