ArgoUML - UML modeling tool

•    Java

ArgoUML is the leading open source UML modeling tool and includes support for all standard UML 1.4 diagrams. It supports Class diagram, Statechart diagram, Activity diagram, Use Case diagram, Collaboration diagram, Deployment diagram and Sequence diagram. The diagram could be exported to GIF, PNG, PS, EPS, PGML and SVG. It generates code for Java, C++, C# and PHP. It also supports reverse engineering, generates code from diagram.

Eclipse Model Development Tools

•    Java

The Model Development Tools (MDT) project provide exemplary tools for developing models based on those metamodels. It supports creating UML diagram, Reverse engineer UML diagram from code, and lot more.

Green - Create UML diagram from code

•    Java

green is a LIVE round-tripping editor, meaning that it supports both software engineering and reverse engineering. You can use green to create a UML class diagram from code, or to generate code by drawing a class diagram. green supports exporting files to both jpg and gif format, so that you can share you diagrams without any issues!

UMLGraph - Automated Drawing of UML Diagrams

•    Java

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. Running the UmlGraph doclet on the specification will generate a Graphviz diagram specification that can be automatically processed to create Postscript, GIF, SVG, JPEG, fig, or Framemaker drawings.

jUML

•    Java

jUML is a UML diagram application capable of reverse engineering Java source code to create relationship diagrams, source code generation based on a user created UML diagram, and saving/restoring of jUML projects.

gaphor - Gaphor is the simple modeling tool

•    Python

Gaphor is a UML and SysML modeling application written in Python. It is designed to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models. Gaphor is a UML and SysML modeling application written in Python. We designed it to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models.

StarUML - UML or MDA Platform

•    Delphi

StarUML is a software modeling tool to develop fast, flexible, extensible, featureful UML/MDA platform running on Win32 platform. It is a good alternative to Rational Rose. StarUML provides simple and powerful plug-in architecture so anyone can develop plug-in modules in COM-compatible languages.

JS/UML

•    Java

JS/UML is a plugin for the Eclipse IDE that reverse-engineers JavaScript code to a UML model which can then be used to generate documentation and other artifacts.

nomnoml - The sassy UML diagram renderer

•    Javascript

Hello, this is nomnoml, a tool for drawing UML diagrams based on a simple syntax. It tries to keep its syntax visually as close as possible to the generated UML diagram without resorting to ASCII drawings. Created by Daniel Kallin. Contributions by Alexander Moosbrugger and korroz.

[C#] UML Touch

This project is my master thesis project for Msc Software Engineering at Oxford Brookes univesity. The goal of this project is to develop a UML Editor, where users can draw their diagram directly on the screen and process it into proper computer diagram using sketch recognition.

Diazy Roundtrip Engineering Toolset

•    Python

Diazy is an application framework for the generation of source code from Dia UML models and the degeneration (reverse engineering) of source code to Dia UML models. This will allow developers to rapidly deploy object oriented design schemes.

Lexakai - A tool for generating UML diagrams and markdown documentation indexes

•    Java

Lexakai is a command line tool used to create UML diagrams and markdown documentation indexes. It creates and updates UML diagrams and README.md documentation indexes from the source code of each maven project discovered recursively from the root folder(s) given as argument(s).

Octopus

Octopus is a plugin for Eclipse provides an IDE for OCL 2.0 and UML. From a combined OCL / UML model a fully working prototype can be generated. Octopus can import XMI from various UML tools. Octopus means OCl TOol for Precise Uml Specifications.

Frame UML

•    Javascript

A free UML tool. 1)Support UML 2.xx; 2)Used in Windows(2000/XP/Vista); 3)Can generate source code /CHM from model, or parse source code into model by JavaScript; 4)Support 12 kinds of diagram except object diagram; 5)Very nice, simple, and easy to use.

jdl-studio - JDL Studio is an online JHipster Domain Language visual editor

•    Javascript

Hello, this is JDL-Studio, an online tool for drawing UML diagrams for JHipster based on the JDL syntax. It tries to keep its syntax visually as close as possible to the generated UML diagram without resorting to ASCII drawings. The JDL-Studio web application is a simple editor with a live preview. It is purely client side and changes are saved to the browser's localStorage, so your diagram should be here the next time, (but no guarantees).

C# Uml Designer

•    CSharp

The tool uses reverse engineering to build UML diagrams for C# project. It automates the displaying of connections between objects and provides convenient synchronization of code and diagrams.

uml2symfony

•    PHP

Uml2symfony is a symfony plugin that can translates a argoUML uml(XMI + pgml) file into symfony elements. It generates schema files and plugins accordingly. A component in the UML diagram is translated into a symfony plugin, and the classes inside the co

Eclipse-PyUML

This project develops a full-functional UML-Roundtrip-Tool for Python. It is realized as an Eclipse Plugin based on the plugins PyDev und Eclipse Uml2Tools. * Full Roundtrip Functionality * Uml2Tools Model Editor included * Live Validation * UML Views

Design Pattern Automation Toolkit

•    VBNET

A toolkit to design applications using design patterns, with facility to generate code, and reverse engineering. Drag and Drop facility to create UML Class diagrams Support to write custom plug-ins for code generators and reverse engineering.

VUML

•    Java

This project targets to develop a visual UML editor for the popular Eclipse IDE. The visual UML editor plugin is fully compatible with the Eclipse Framework and allow developers easily to model and document their software through the UML2 diagrams.