PlantUML is described as 'Open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others' and is a very popular Diagram Editor in the development category. There are more than 100 alternatives to PlantUML for a variety of platforms, including Windows, Web-based, Mac, Linux and Self-Hosted apps. The best PlantUML alternative is draw.io, which is free. Other great apps like PlantUML are Excalidraw, yEd Graph Editor, Dia and Freeplane.
GenMyModel is an online modeling plateforme for UML, BPMN2, Database, Flowchart and more. It supports realtime collaboration, centralized model repository, versioning and full traceability.
Generate diagrams from text faster than ever and facilitate stakeholders involvement via animation and online collaboration.
TopCoder UML Tool is an easy to use, consistent modeling tool for use in Design and Development competitions. The new tool was built to model sequence, class, use case, and activity diagrams. On top of that, all those elements can have documentation easily attached to them.
Professional business process modelling on Microsoft platforms. Instantly turn your Visio files into structured corporate model. Enterprise Explorer instantly reveals all corporate business objects and metadata behind your regular office files.
WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to recent Delphi editions, reducing dependence on third party components and fixing bugs and adding new features.
Nevron Vision for .NET provides a complete set of components for data visualization that integrate with WinForms, Wpf, ASP.NET, and MVC applications.
Cubetto gives you the opportunity to model in modeling languages from a vast set of selections. You can choose between BPMN, Event-driven Process Chains (EPC) to Flowcharts. Even a generic modeling language for your own needs is available.
Free Sequence Diagram Tool Online. Clean simple interface and fast client side processing. Works Online and Offline, Scripting and Drag and Drop.
Integrated development environment that can help you define models for your applications in a streamlined manner and test the results.
blockdiag and its family generate diagram images from simply text file.
Features:
Supports many types of diagrams block diagram (w/ blockdiag) sequence diagram (w/ seqdiag) activity diagram (w/ actdiag) logical network diagra.
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
MyDraw is an easy to use, yet powerful diagramming software that lets you create a large number of diagrams like flowcharts, organizational charts, mind maps, network diagrams, floor plans, family trees, business model diagrams, and many more.
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Live drawing combined with text view!