db4o open source object database is completely native to Java and .NET 100% object-oriented, putting aside object-relational mapping, it is an open source optimized for embedded applications and can be used for free under the GPL license. You'll get a head start on your development time by embedding db4o's native Java and .NET object database engines into your products and stores, and even more complex object structures with just one line of coding! db4o can help you save R&D costs and time, provide better operations, and eliminate the need to hire a database administrator. Download and test the world's most popular object database on hardware! Under the GPL, it's open source and free, no registration required!
