ArgoUML is a tool for drawing UML (Unified Modeling Language) diagrams, it supports UML1.3 Meta-Model Specifications. This version supports Class diagram, State chart diagram, Activity diagram, Use Case diagram, ...

Gaphor is a UML drawing tool written in Python language. Unified Modeling Language (UML) has become the standards for writing software specifications. Gaphor can draw most UML diagrams, ...