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Violet is a free UML editor with these benefits : very easy to learn and use, draws nice-looking diagrams, cross-platform. Violet is intended for developers, students, teachers, and authors who need to produce simple UML diagrams quickly

Software development tools support UML, SysML, BPMN, Business Rule, ERD and mind mapping. All Visual Paradigm tool can run on Windows, Linux and Mac OSX.

Cadifra UML Editor - UML Tool for Windows

AlternativeTo let you find new PC (Windows, Linux), Mac, iPhone, Android, Web/Online software based on applications you already know instead of useless categories. We make each application into a category. (AlternativeTo is sometimes called alternati...

Web Development Tutorials, Tips and Tricks on ASP.NET, jQuery, JavaScript, .NET, LINQ, Open Source Tools, Silverlight, Visual Studio and much more

Free software development magazine: Software Testing, Project Management, Requirements Programming (Java, .NET, Ruby on Rails, Ajax), UML, Agile (eXtreme Programming,Scrum, Test Driven development)

Quora is a continually improving collection of questions and answers created, edited, and organized by everyone who uses it.

StarUML, free download. StarUML 5.02: The Open Source UML/MDA Platform. Modelling software usually comes in gradients - from the insanely complicated to the insanely easy like