JDataStore
JDataStore is a fast, versatile, all-Java database that allows developers to write powerful, scalable stand-alone, embedded, mobile and Web based applications. JDataStore is the database of choice for Oracle, DB2 and SQL Server developers when they have a project that requires a powerful but compact database that must run maintenance free in production environments where there is no dba or IT support. JDataStore is J2EE and SQL 92 compliant and it is so fast that it can make sluggish Java applications look good.