Runway

The software provides a visual environment for creating and editing Unified Modeling Language diagrams, allowing users to construct class, sequence, activity, and other standard UML charts. It supports drag‑and‑drop placement of elements, automatic layout adjustments, and the ability to export diagrams in common image formats for documentation or presentation purposes.

Targeted at developers, system architects, and analysts who need to model software structures and workflows, the application runs natively on macOS, integrating with the operating system’s interface conventions. Its stable release status indicates that core functionality is mature and reliable for everyday use in design and planning tasks.

Distinctively, the tool focuses solely on UML modeling without bundling broader project management or code generation features, offering a streamlined experience for users whose primary requirement is to visualize and communicate system designs.