UML Unified Modeling Language Tools: use cases, class diagram, sequence diagram, object diagram, MDA
UML Tools Presentations and Reviews
ArgoUML Open Source Unified Modeling Language
StarUML - Open Source UML Tool
Demonstration of PlantUML in Eclipse
Top online UML modeling tools in 2018 (also including web-based tools for ER and BPMN diagrams)
BOUML – Free Unified Modeling Language (UML) and Code Generation Tool