Object-oriented database management systems

Unix operating system from IBM

database management system

Python object database management system

db4o (database for objects) was an embeddable open-source object database for Java and .NET developers. It was developed, commercially licensed and supported by Actian. In October 2014, Actian declined to continue to actively pursue and promote the commercial db4o product offering for new customers.

commercial operational database management system from InterSystems

GemStone/S is computer software, an application framework that was first available for the programming language Smalltalk as an object database. It is proprietary commercial software.

InterSystems Corporation is a privately held vendor of software systems and technology for high-performance database management, rapid application developmentintegration, and healthcare information systems. The vendor's products include InterSystems IRIS Data Platform, Caché Database Management System (now largely superseded by IRIS), the InterSystems Ensemble integration platform (more recently marketed as HealthShare Health Connect), the HealthShare healthcare informatics platform and TrakCare healthcare information system, which is sold outside the United States.