Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.

Violet UML Editor is described as 'Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams. Completely free. Cross-platform. Violet is intended for developers, students, teachers, and authors who need to produce simple UML diagrams quickly' and is a UML Modeling tool in the development category. There are more than 25 alternatives to Violet UML Editor for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best Violet UML Editor alternative is draw.io, which is free. Other great apps like Violet UML Editor are Pencil Project, Lucidchart, PlantUML and Visual Paradigm.
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.

A Powerful idea processor.It's Open Source and Freeware. Create UML Diagrams, Network Diagrams, Flowcharts and many other types of diagrams with the versatile Dynamic Draw Software.




Lightweight, powerful, easy to use, UML tool
Software Ideas Modeler is a lightweight and powerful CASE tool. It supports UML 2.2 diagrams and a lot of other ones. Software Ideas Modeler is freeware (for non-commercial use). Commercial user may use this software only after buying.

NClass is a free tool to easily create UML class diagrams with full C# and Java language support. The user interface is designed to be simple and user-friendly for easy and fast development. Properties, enums, delegates and other language specific elements are fully supported...



WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to recent Delphi editions, reducing dependence on third party components and fixing bugs and adding new features.




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 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.




ClassBuilder is freeware CASE tool targeted at the C++ developer, running on Win2K-XP. It lets you create, manipulate and navigate classes, class relations, class members and class methods at a high level of abstraction through a graphical user interface.


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

MockupTiger is a web based application that helps you to build fluid wireframes, mockups or prototypes for your next web application or desktop software.

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.

