An object relational-mapping (ORM) library for Java
Toolkit for working with and mapping geospatial data
Java persistence using JDO, JPA or REST
SQLObject is a Python ORM.
ETL engine based on Groovy
Database file mapping names to records, implementing a file-system
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
Concise spatial query and representation system (c-squares)
Mature SGBD in Perl with a web interface
FastVersion is a Qgis plugin for data versioning in a Postgis database
plugin-based framework for systematic and reproducible experimentation
Dendrochronological sample measurement, curation and analysis program
Java library to remove Object/Relation Impedance
Simple Java ORM
modern web applications development made easy