eXtremeDB - Main memory database for embedded devices with no need for secondary storage persistency. Provides ACID transactions. Schema compiler generates object-oriented-like interface using C as target language. Available for Win32/Windows CE, QNX, VxWorks, Linux and others.
ZOPE - The Z Object Publishing Environment consists of an object database (ZODB) and application server (ZServer) written in Python.
Generic Object Oriented Database Management System (GOODS) - Fully distributed ODBMS using a fat client model. The client side contains an adaptation layer to enable language independence and metaobjects to represent different aspects of transactions and caching. Currently only C++ bindings. [Open Source]
Orient - ODBMS compliant with the ODMG 3.0 standard. It's available as Just Edition (for small applications) and Enterprise Edition with extra components for replication, load-balancing and fault-tolerance. Supports Windows and Linux. Free Just version available on Web site.
ConteXt - An object-based database management system optimized for user interaction instead of transaction processing. It includes a database browser providing secure access to its server across the Internet. C++ binding for several flavours of UNIX. [Source code freely available but not on website.]
Object-Oriented Database Management Systems Revisited - This report provides a critical review and technology assessment of Object-Oriented Database Management Systems and evaluates seven major ODBMS.
GigaBASE - Single-node DBMS with SQL-like query language, arrays, computed attributes and a C++ API. [Open Source]
Zope IndexedCatalog - is an LGPL extension to the Zope DB that provides indexing and querying.
Cetus on Object-Oriented Database Management Systems - Links to evaluations, benchmarks and products.
EyeDB - ODMG 3.0 compliant DBMS (including OQL) with manipulatable classes, templates and triggers. Supports multi-database objects. C++ and Java bindings. [Free for educational purposes]
Choosing the Right OODB Solution - A short comparison of ObjectStore, Versant, Poet, and Objectivity mostly focusing on the evaluation criteria.
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