Lucidchart
Freemium
Lucidchart is a web-based application to draw diagrams.
Graphviz
Open Source
Graphviz (Graph Visualization Software) is a package of open-source tools initiated by AT&T Labs Research for drawing graphs specified in DOT language scripts…
Umbrello
Open Source
Umbrello UML Modeller is a free software UML diagram tool available natively for Unix-like platforms and Windows.
Astah Community is a free software design tool which supports the latest UML diagrams.
PlantUML
Open Source
PlantUML is an open-source tool allowing users to create UML diagrams from a plain text language.
StarUML
Commercial
StarUML is an opensource UML tool.
Visual Paradigm
Commercial
Visual Paradigm (VP-UML) is a UML CASE Tool.
Compare UMLet with alternatives
Compare Visual Paradigm and UMLet and decide which is most suitable for you.
Compare astah Community Edition and UMLet and decide which is most suitable for you.