An object relational-mapping (ORM) library for Java
Toolkit for working with and mapping geospatial data
SQLObject is a Python ORM.
Java persistence using JDO, JPA or REST
Relational database replication tool based on XML Schema
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)
File System Relational / Object Oriented DBMS/CMS
FastVersion is a Qgis plugin for data versioning in a Postgis database
C++11 wrapper for the LMDB embedded B+ tree database library.
Graphical database import/export and mapping tool
Dendrochronological sample measurement, curation and analysis program
Java library to remove Object/Relation Impedance