GenMyModel!

Lucidchart is an online diagram and flowchart software that supports Microsoft Office Visio import and can work on any operating system. The easiest way to draw flowcharts, wireframes, UML diagrams, network diagrams, mind maps, iPhone mockups, site maps and more. Work together in real time with your team and clients! Along with the online version, Lucidchart also has a downloadable solution that runs on Mac, Windows and Linux; this enables offline editing at any time! »

Lucidchart is an online diagram and flowchart software that supports Microsoft Office Visio import and can work on any operating system. The easiest way to draw flowcharts, wireframes, UML diagrams, network diagrams, mind maps, iPhone mockups, site maps and more. Work together in real time with your team and clients! Along with the online version, Lucidchart also has a downloadable solution that runs on Mac, Windows and Linux; this enables offline editing at any time! »

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others. Mostly based on Graphviz. Can render various diagram syntax such as PlantUML, Dot, and Ditaa.

UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and create new, custom UML elements.

Visual Paradigm for UML (VP-UML) is a UML design tool and UML CASE tool designed to aid software development. VP-UML supports key modeling standards such as Unified Modeling Language (UML) 2.4, SysML, ERD, DFD, BPMN 2.0, ArchiMate 2.0, etc. It supports software development teams in requirements capturing, software planning (use case analysis), code engineering, class modeling, data modeling, etc.

Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE. UML allows you to create diagrams of software and other systems in a standard format.

Enterprise Architect is a collaborative modeling, design and management platform based on UML and related standards. Agile, intuitive and extensible with fully integrated, powerful domain specific high-end features at a fraction of the cost of many competitors. An enterprise wide solution for visualizing, analyzing, modeling, testing and maintaining a wide range of systems, software, processes and architectures. Team based, with a proven track record and close to 200,000 users worldwide.

Lightweight, powerful, easy to use, UML tool

Online tool for visual database design. This one web application support seven major database engines: PostgreSQL, MySQL, Microsoft SQL Server, SQLite, Oracle 11g, IBM DB2 and HSQLDB.Vertabelo allows you to create your database model simply by graphically drawing tables and references. The application validates your model all the time and gives you hints on how to improve it. At any moment you can see a preview of the SQL that will be generated for a selected element.You can share your database models at three different access levels: Owner, Editor and Viewer. Furthermore, everyone who shares a model may open it at the same time. When the model is opened for editing for one person, it is read-only for others. Everyone can see changes in the model just after an autosave.If you need to share a model with your customers or partners and they don't want to create accounts in Vertabelo, you can generate the public link to your model and send it via e-mail.Reverse engineering tool allows you to import an existing database structure and build a model of it. This way you can visualize the data structure of your database and work on it.If you develop web applications, Vertabelo delivers you built-in support for some popular ORMs like Propel (for PHP developers), SQLAlchemy (for Python developers) and JOOQ (for Java developers).The application works completely online and no installation is needed. Just register an account, log in and you can start working on your model from any place in the world connected to internet. Vertabelo offers a free plan which is limited by a certain number of models available to create and the number of tables per one model. For larger projects and companies there are different paid plans. Notice that Vertabelo is totally free for students, lecturers, open source projects and non-profit organizations, provided that it will be used only for educational or non-commercial purposes. »

Graphical modelling open source UML2 tool based on Eclipse environment.

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.

ProcessOn provides an easier way to create diagrams.It's completely FREE OF CHARGE .Drag and drop shapes, icons and other usuful elements in your logic thinking or following your procedure, then optimize your diagrams’ color, style,so everyone even the beginner will become a diagram rockstar just in a minute.ProcessOn also has a diagram library where you can choose tons of shapes and objects then share them through social network. Templates included:-Flowcharts-BPMN-Value chain-ERD-UML-UI/IOS mockups-Org charts-Venn diagrams-MindmapProcessOn is also a professional social network, specially designed for digrammers, designers, consultants, IT engineers.You just can connect with the experts or influences in your professional field, in the meantime, you can rise your personal reputation as well.Here you wont’ miss the lastest trends in one’s specific field.Now we support 5 languages. »

From free light-weight versions which provide Intuitive UML software at no cost; to the most powerful UML Plus software on the market Astah allows your team to communicate clearly and easily across platform. Take your Modeling to the next level with Astah.

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 with strict syntactical and semantical verification.