ArgoUML

ArgoUML is a free, open-source desktop modeler for teams and individuals working with UML 1.4. It is strongest when diagrams need to connect to source code, model interchange, or formal constraints; users who require a newer UML standard or want to avoid a Java runtime should consider other tools.

Overview

ArgoUML follows the OMG UML 1.4 specification and stores models in a JMI-based repository. That focused compliance is useful for projects tied to UML 1.4, but it is a constraint for teams whose process depends on another UML version.

XMI is the normal save format. The application imports XMI 1.1 and 1.2 and writes XMI 1.2, providing a practical interchange route for compatible tools. Diagram output covers GIF, PNG, PostScript, Encapsulated PostScript, PGML, and SVG, so users can produce both raster images and scalable or print-oriented files.

Key features

Modeling and guidance

The tool covers all nine UML 1.4 diagram categories, with class, statechart, activity, use case, collaboration, deployment, and sequence diagrams among the documented types. That breadth suits a project that needs a complete UML 1.4 model rather than a single diagram style.

Background design critics review the model and place suggestions in a to-do list instead of interrupting the drawing workflow. This is useful for a designer who wants ongoing prompts, although it remains advisory rather than a replacement for formal review. ArgoUML also supports creating and distributing UML profiles, and includes Java, C++, and UML 1.4 profiles for teams standardizing modeling conventions.

Code, constraints, and exchange

Code generation targets Java, C++, C#, PHP4, and PHP5. Reverse engineering supports Java source plus Java JAR and class-file imports, making the product more relevant to existing codebases than a diagram-only editor. The combination is a clear advantage for developers who want a model-to-code or code-to-model workflow.

OCL constraint modeling includes syntax and type checking through the Dresden OCL toolkit. It therefore fits requirements or designs where constraints must be expressed and checked, not merely drawn. Internationalization covers American and British English, French, German, Italian, Portuguese, Spanish, Russian, Norwegian Bokmål, and Chinese.

Pricing

Free/Open source — free. The plan is distributed under the Eclipse Public License (EPL) 1.0 and requires Java 5+. There are no paid tiers or seat quotas in the supplied plan information, so it is the natural fit for individuals, classrooms, and teams seeking an open-source UML 1.4 tool without a purchase. The trade-off is environmental: users must provide a compatible Java runtime, and the product's UML 1.4 focus may not match newer modeling requirements.

Platforms

ArgoUML is a desktop application for Windows, macOS, and Linux through a Java runtime. The project provides installation through Java Web Start. Because it is written entirely in Java and targets Java 5 or Java 6, platform choice is broad but runtime compatibility is a material part of deployment planning.

Who it's for

Choose ArgoUML for UML 1.4 projects that need comprehensive diagram coverage, XMI interchange, code generation, or Java reverse engineering at no software cost. It also suits teams that value distributable UML profiles and OCL checking. It is a weaker fit when a project requires a different UML standard, a browser-first workflow, or an environment where maintaining the required Java runtime is undesirable.

Pros and cons

• Pro: All nine UML 1.4 diagram types support broad specification-based modeling.
• Pro: Generation for five languages and Java reverse engineering connect models with implementation work.
• Pro: XMI import/export and six diagram formats make sharing and publishing flexible.
• Pro: OCL syntax and type checking add useful constraint validation.
• Con: Compliance is specifically with UML 1.4, limiting projects built around another standard.
• Con: Java 5+ is required, so runtime provisioning is part of installation and support.

Alternatives

Browse UML Modeling Software for a wider category comparison.

• Sparx Enterprise Architect is the alternative to consider when you want a freemium product with a free trial and multi-user projects.
• BESSER suits users wanting free, open-source modeling across desktop, web, and API environments with no hidden fees.
• kUML is another free, open-source option with desktop, web, self-hosted, and API availability.
• UMLet is a free open-source choice offering standalone desktop apps plus an Eclipse plugin, web app, and VS Code extension.
• BOUML is a free UML tool for Windows, macOS, and Linux.
• BridgePoint provides free open-source editor, verifier, and model compilers.
• Eclipse Papyrus is a free open-source modeling environment with desktop, web, and self-hosted availability.
• Gaphor is a free, Apache 2 licensed open-source alternative for Windows, macOS, and Linux.

Verdict

ArgoUML is a strong match for developers and modelers who specifically need a free UML 1.4 desktop environment with code generation, reverse engineering, XMI, and OCL support. Look elsewhere if your project depends on a newer UML standard or if the Java runtime requirement makes deployment a poor fit.