UMLet

Unified Modeling Language (UML) is the standard visual representation for your software design.  UML diagrams are the most popular way to visually document your code.  They are similar to process flow diagrams or flowcharts used in many different fields, but using the UML standard model for software is the most popular.  UML diagrams are used for forward and backward design, process review, ease of explanation of software in a standardized format, and can also be used as a type of pseudocode to better represent and explain a piece of software or program with many interacting components.

UMLet is a free, open-source, lightweight, and easy to use the program to create and modify your own UML diagrams.  The Quickstart features will let you dive right in and get started immediately, with an intuitive user interface including the ability to add elements to a UML diagram with a simple double-click. 

For more information and for the latest version of the software, please go to umlet.com where version 14.3 is currently available for download.  The website also includes supporting elements such as an FAQ, a video tutorial, example screenshots, user comments, and more to help you get up and running quickly.  You will be creating your own UML diagrams in no time. 

Free, lightweight and easy to use

• Free
• Easy to use
• Quickstart functionality to dive right in
• Open source code
• Draw, modify, build, save, and share UML diagrams
• Supports export formats including PDF, JPG, EPS, and SVG
• Add elements with a double-click
• Select multiple elements by holding Ctrl
• Mouse-wheel zoom
• Supports a variety of UML diagram types including class diagrams, use-case, state diagrams, activity diagrams and more
• Create your own custom UML elements by modifying the Java directly in the program
• Bug logging and new feature requests still being supported via GitHub

If you’ve ever heard of a UML diagram, you should probably install this tool.  Even if you don’t currently use these frequently, when you realize how easy it is you just might start.