A high performance real-time analytics database
jdbi is designed to provide convenient tabular data access in Java
TypeDB: a strongly-typed database
Toolkit for working with and mapping geospatial data
ETL engine based on Groovy
Database file mapping names to records, implementing a file-system
Heap organised database service (Java library)
Java database mapper
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
Field data measurements entry and complex data structures at ease
Big Sack: A lightweight Java Key/Value store with undo and disk cache.
Java API and Groovy Library for XML Scripting