db4o (database for objects) is the open source object database, native to Java and .NET.

Free software, available under the GPL and under a commercial license.

Persist any object with one line of code. Other features are object-oriented replication, native queries, automatic schema recognition, 350K footprint.

Ideal for embedded use, e.g., in software running on mobile or medical devices, in packaged software, and for real-time systems.

JDOInstruments is an embedded object oriented database programmed in java, it is also an implementation of Sun's Java Data Objects (JDO) specification for the transparent persistence of Java objects.

db4o (database for objects) is the open source object database for Mono.

Free software, available under the GPL and under a commercial license.

Persist any object with one line of code. Other features are object-oriented replication, native queries, and automatic schema recognition.

Ideal for embedded use, e.g., in software running on mobile or medical devices, in packaged software, and for real-time systems.

db4o (database for objects) is the open source object database, native to Java.

Free software, available under the GPL and under a commercial license.

Persist any object with one line of code. Other features are object-oriented replication, Native Queries, automatic schema recognition, 350K footprint.

Ideal for embedded use, e.g., in software running on mobile or medical devices, in packaged software, and for real-time systems.

"Java/Zigzag" language, for development of a high-performance mobile object-relational database application. Main advantage of Zigzag to SQL is manipulation with classes (in addition to relations). Zigzag algebraic expressions process XML data with dynamic structure and multi-level hierarchy.

db4o (database for objects) is the open source object database, native to .NET.

Free software, available under the GPL and under a commercial license.

Persist any object with one line of code. Other features are object-oriented replication, Native Queries, automatic schema recognition, 350K footprint.

Ideal for embedded use, e.g., in software running on mobile or medical devices, in packaged software, and for real-time systems.

Sav ZBase is a Java-coded ORDBMS featured by Zigzag language - more expressive than SQL. The some peculiarities of database: many-valued data, multi-level classification, class inheritance, dynamic structure, and automatic data integrity control. Product consists of the next tools: ZInterpreter, ZNavigator.