NClass

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...

Free Open Source Windows Linux

UML Designer

UML Designer provides a set of common diagrams to work with UML 2.5 models. The intent is to provide an easy way to make the transition from UML to domain specific...

Free Open Source Mac OS X Windows Linux

Gaphor

Gaphor is a Python-based, easy to use modeling environment. This means that you are able to create nice UML diagrams for documentation and to assist you with design...

Free Open Source Mac OS X Windows Linux

Poseidon for UML

Dont lose the advantage of clarity and simplicity to an overly complicated tool - the Poseidon for UML software line lets you get down to work without entanglements in...

Free Mac OS X Windows Linux

IBM Rational Rose Enterprise

Rational Rose is an object-oriented Unified Modeling Language (UML) software design tool intended for visual modeling and component construction of enterprise-level...

Commercial Windows