System Designer Alternatives

WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to...

UModel is a web-based tool that enables developers to use UML diagrams to express their software requirements.

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more

Try for free paid Free Trial $15.0 / Monthly (125+ Documents)

The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.

SEQO generates UML sequence diagrams from a simple text.

A Powerful idea processor.It's Open Source and Freeware.

Yuml.me is a legit modeling tool that comes with the strategic measure that let teams and individual create diagram more quickly via simply typing plain text.

Eclipse Papyrus is an industrial-grade open source Model-Based Engineering tool. Eclipse Papyrus has notably been used successfuly in industrial projects and is the base platform for several industrial modeling tools.

The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE.

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

Online diagramming application

Open Source

Chrons Web Modeler, now named Olympos, is a collaboration tool that you can use to create UML models and diagrams with features like document, report, and code generator.

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams.