ECO IV is the latest release of "Enterprise Core Objects", an application framework that allows you to take applications from design to implementation in a much shorter time. ECO enables you to easily implement your applications as business classes rather than traditional data access. Instead of accessing the database directly your application will interact with the business classes you have designed using the UML. This approach ensures uniformed behavior throughout your application, and even across multiple applications if you choose to reuse your UML packages in more than one application; for example if you choose to implement both an ASP .NET and WinForm version of your application.

UML tool where you can develop at model level and automatically generate source code for C++.

jUML is a UML diagram application capable of reverse engineering Java source code to create relationship diagrams, source code generation based on a user created UML diagram, and saving/restoring of jUML projects.

WUml is an easy to use lightweight UML-Editor for educational purpose.

The Thinkwise Software Factory Suite is an integrated development environment with which business software can be easily developed, tested and managed. It is even possible to automatically modernize existing software. The Thinkwise environment is particularly suitable for developing business software, such as ERP applications, research applications and apps. This type of software may consist of workflow, user interface in Windows, Web or mobile devices, application logic/services and database/data services.

SequenceDiagram.org is a a free online tool to create UML sequence diagrams. It doesn't have any ads or other clutter. All processing of parsing and painting the diagram is done using javascript client side in the users web browser. This not only makes it snappy to work with, but it also means that secrets are safe if you chose to put any into the diagram. Since no backend server is used it is also possible to use the web application offline. This makes it nicer to work with compared to the other alternatives out there. This is also the only sequence diagram tools which allows you to:
* Script using a simple text notation when it is most convenient to do so, and
* Interact using you mouse to draw arrows or create notes when that is most convenient.

Telelogic Modeler™, a free UML 2.1-based software design tool. Designed to remove acquisition cost barriers by a key author and supporter of UML, this FREE modeling product allows users to leverage the benefits of improved communication by using a standard graphical language to specify, visualize and document systems and software designs. Offered at no charge, Modeler allows users to increase their productivity and shorten design cycles.

MacA&D is a comprehensive tool for system modeling and simulation, requirements management, structured analysis and design, object-oriented modeling with UML and data modeling of information systems. It has diagram editors for process models, data models, class models, state models, object models, structure models and task models. Each model shows a different view of the software system integrated through a global data dictionary. Dictionary and model information can be used to generate code for several languages including C++, Java, Delphi, Objective-C and SQL. Dynamic systems can be modeled, parameterized, simulated and charted. The tool provides requirements specification and traceability, design verification reports and text import/export features. The integrated report generator includes dozens of standard reports plus a scriptable environment for creating custom reports. The Site License edition supports multi-user team dictionary and requirement documents making it well suited for team development.

Innovator is the integrated modeling platform for methodically sound and efficient realization of MDA development. Absolute focus towards OMG standards guarantees methodical accuracy and clarity throughout the entire development process. Innovator offers a broad range of use, from business process modeling, object-orientated and structured software analysis and design, right through to the manufactured software model. Innovator uses UML for business process modeling, which allows for a uniform, standardized notation of the business process model right through to the system design model. Innovator is particularly suitable for MDA application, as the product can be used with UML profiles for language extension.

gModeler is a free online UML diagramming and documentation tool, targetted at developers working with ECMA 262 languages such as FlashMX's Actionscript, and Javascript. In addition to it's diagramming capabilities, it exports HTML documentation, FlashMX XML documentation (for the Action Panel and Reference Panel) and stub code (class code).