StarUML
Commercial
StarUML is an opensource UML tool.
Visual Paradigm
Commercial
Visual Paradigm (VP-UML) is a UML CASE Tool.
Astah Community is a free software design tool which supports the latest UML diagrams.
Umbrello
Open Source
Umbrello UML Modeller is a free software UML diagram tool available natively for Unix-like platforms and Windows.
Bonita BPM
Open Source
Bonita BPM is an open-source business process management and workflow suite.
Compare Modelio with alternatives
Compare Visual Paradigm and Modelio and decide which is most suitable for you.
Compare astah Community Edition and Modelio and decide which is most suitable for you.