Vitess is a database clustering system for horizontal scaling of MySQL
A modern replacement for Redis and Memcached
ACID Document Database
Pika is a Redis-Compatible database
Distributed, in-memory key/value store and cache
A Redis based, fully automated and scalable database cache layer
Infinispan is an open source data grid platform
The lightweight, distributed relational database built on SQLite
C# .NET NOSQL ( key value store embedded ) ACID database
Garnet is a remote cache-store from Microsoft Research
A multi-threaded, multi-database tcp-based database insertion app.
A web front end for an elastic search cluster
Open Design and Integration Environment
High-Availability JDBC
although fully functional, this is a pre-framework that you can extend