NetBeans, yet another Open-source Java IDE & JBean platform !!!

Welcome to NetBeans
* The NetBeans IDE is a development environment - a tool for programmers to write, compile, debug and deploy programs. It is written in Java - but can support any programming language. It is a free product with no restrictions on how it can be used.

* The NetBeans platform is an application runtime - a "generic large desktop application." Most desktop applications have common requirements - menus, document management, settings and so forth. Nobody enjoys writing menu code or setting storage code. With the NetBeans Platform, you don't have to. Just write modules to implement what you need, bundle them up with the NetBeans Platform, and you have a beautiful, branded, cross-platform application. And if you need custom functionality or components, the Platform is built to be flexible.

[UML]: Architects & Software developers

Practical UML?: A Hands-On Introduction for Developers: "...Architects design buildings. Builders use the designs to create buildings. The more complicated the building, the more critical the communication between architect and builder. Blueprints are the standard graphical language that both architects and builders must learn as part of their trade.
Writing software is not unlike constructing a building. The more complicated the underlying system, the more critical the communication among everyone involved in creating and deploying the software. In the past decade, the UML has emerged as the software blueprint language for analysts, designers, and programmers alike. It is now part of the software trade. The UML gives everyone from business analyst to designer to programmer a common vocabulary to talk about software design."