Rational Modeler

The IBM® Rational® Modeler product is a free UML-based software design tool.

Leverage free UML based modeling to specify, visualize, and document systems and software designs using the free IBM® Rational® Modeler product.

Helps increase productivity and shortens design cycles via a visual design environment.
Aids in eliminating errors with automatic push button documentation features.
Manages design complexity challenges within a standardized UML environment.
Communicates design intent through a common graphical language.
Provides diagrams to form a unified model, guiding and enabling the creation of complete and correct applications.
Offers a powerful customizable design environment that allows users to target their domain using domain-specific terminology and notations.
Easily upgrades to the IBM® Rational® Rhapsody® model-driven development environment.
Modeler Corporate Edition integrates with configuration management tools including IBM® Rational® Synergy and IBM® Rational® ClearCase®.
The basic Rational Modeler is free. Download here.
Operating systems supported: Windows family