Athena Framework for Java is a full fledged enterprise object-relational mapping (ORM) framework that employs metadata as mapping configuration. It greatly simplifies Java Web application development by removing the requirement of manual mapping and manual database schema updating. In addition to features like Java object persistence, powerful EJBQL querying execution, and comprehensive code generation, Athena has built-in support for multi-tenancy, which enables developers to build cloud applications easily. Athena can be easily integrated with other libraries like Struts or Spring to provide full stacks of service.
NW.ORM is a simple wrapper for accessing databases using hibernate in Java. It makes working with multiple databases easy. Aside from adding dependencies to your project and placing your hibernate configuration files in your classpath, no extra configuration is required. NW.ORM provides base classes for JPA-based class definitions. You can query using your method of choice. NW.ORM supports Criteria, HQL, and raw SQL.