CodaServer is a database that makes building business applications easy. It uses a SQL-like language that lets you describe your workflow and business processes, and uses this information to enforce your business rules and guarantee data integrity. It also has a rich set of metadata commands so that your applications can get the information they need to build intelligent, process-aware user interfaces. CodaServer's listener is Web service-based, making it truly cross-platform, and it uses standard SQL databases for storing data, protecting your current investment.
JalistoPlus is lightweight, transactional, 100% pure Java database. It is object oriented and is able to directly persist and query for Java object graphs. It has a modular design and may be used either in single or multi-threaded mode. Besides basic operations (create, update, delete, and read), a query module is available. It offers a standard set of operators (i.e. equal, smaller, greater, not, and, or) to build the filter expression. Optionally, indexes may be defined on persistent fields to speed up query execution time.