Hibernate Relational Persistence Framework

Hibernate Relational Persistence Framework: "Hibernate is a powerful, high performance object/relational persistence and query service. Hibernate lets you develop persistent classes following object-oriented idiom - including association, inheritance, polymorphism, composition, and collections. Hibernate allows you to express queries in its own portable SQL extension (HQL), as well as in native SQL, or with an object-oriented Criteria and Example API..."

Spring Framework

Springframework.org: "As the leading full-stack Java/J2EE application framework, Spring delivers significant benefits for many projects, reducing development effort and costs while improving test coverage and quality."

Ruby Home Page - What's Ruby

Ruby - What is it?
Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, extensible, and portable.

Oh, I need to mention, it's totally free, which means not only free of charge, but also freedom to use, copy, modify, and distribute it.

Ruby on Rails

Ruby on Rails: "Rails is a full-stack framework for developing database-backed web applications according to the Model-View-Control pattern. From the Ajax in the view, to the request and response in the controller, to the domain model wrapping the database, Rails gives you a pure-Ruby development environment. To go live, all you need to add is a database and a web server. "

Sun Java Developer Tools

Sun Developer Tools
You can speed up your Applications Development by employing these robust, Enterprise
level tools from the creator of JAVA - Sun MicroSystem.