UMLGraph allows the declarative specification and drawing of UML class and sequence diagrams. The current features are part of an ongoing effort aiming to provide support for all types UML diagrams.

TopCoder UML is described as 'Tool is an easy to use, consistent modeling tool for use in Design and Development competitions. The new tool was built to model sequence, class, use case, and activity diagrams. On top of that, all those elements can have documentation easily attached to them' and is a UML Modeling tool in the development category. There are more than 10 alternatives to TopCoder UML for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best TopCoder UML alternative is PlantUML, which is both free and Open Source. Other great apps like TopCoder UML are Visual Paradigm, StarUML, Modelio and UMLet.
UMLGraph allows the declarative specification and drawing of UML class and sequence diagrams. The current features are part of an ongoing effort aiming to provide support for all types UML diagrams.

BOUML is a free UML 2 tool box (under development) allowing you to specify and generate code in C++, Java, Idl, Php and Python.

A lightweight HTML5/javascript library for UML 2 diagramming.
Alpha software. This project is in progress. Many functionalities are ready to be used. Nevertheless, some features and developments will not be neccessarily available for download.
GenMyModel is an online modeling plateforme for UML, BPMN2, Database, Flowchart and more. It supports realtime collaboration, centralized model repository, versioning and full traceability.


Integrated development environment that can help you define models for your applications in a streamlined manner and test the results.




System Designer is the most popular iPhone, iPad & Android Tablet alternative to TopCoder UML.
Dont lose the advantage of clarity and simplicity to an overly complicated tool - the Poseidon for UML software line lets you get down to work without entanglements in your development environment. Powerful features such as round trip engineering and documentation generation...
Whether you are a Business Architect, System Architect, Developer, Analyst or Designer, Modeliosoft meets your needs through its high quality solutions for modeling, and report, architecture or code generation.




ckwnc is a uml sequence diagram creation tool that uses an intuitive c-style language to automatically create uml diagrams that can be saved as an image or embedded directly into other pages
RadDiagram offers flexible and interactive diagramming layouts for your rich data-visualization applications. The framework tool set enables you to:


