EyeDB

EyeDB is a top-notch Object Oriented Database Management System (OODBMS), developed based on the ODMG 3 specification. One of the standout features of EyeDB is its advanced object model. It allows for inheritance, collections, arrays, methods, triggers, constraints, reflexivity, and more. Additionally, it boasts an object definition language that is modeled on ODMG ODL. This makes it easy to describe objects and their attributes.

EyeDB also comes with an object query and manipulation language based on ODMG OQL. With this language, users can retrieve and manipulate objects within the database. This fantastic project also features programming interfaces for C++ and Java. This feature makes it a versatile software for developers who prefer either language.

Furthermore, EyeDB is free software and operates under the GNU Lesser General Public License. The latest release mainly focuses on bug fixes. It has also added support for pkg-config. This feature makes it more efficient when compiling and linking against EyeDB libraries.

In sum, EyeDB is an excellent OODBMS that provides a robust object model, programming interfaces for C++ and Java, and a query and manipulation language for retrieving data within the database. All these fantastic features make it a software to consider for anyone looking to manage complex objects efficiently.