Sketch.systems helps software designers think about complex product behavior. Sketch out states, add prototypes, and clarify questions quickly.
Cost / License
- Free
- Proprietary
Platforms
- Online

Papyrus UML is described as 'Graphical modelling open source UML2 tool based on Eclipse environment' and is a UML Modeling tool in the development category. There are more than 25 alternatives to Papyrus UML for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best Papyrus UML alternative is yEd Graph Editor, which is free. Other great apps like Papyrus UML are Lucidchart, PlantUML, Umbrello and Visual Paradigm.
Sketch.systems helps software designers think about complex product behavior. Sketch out states, add prototypes, and clarify questions quickly.

Bonita BPM is a BPM-based application platform that is designed to help users build highly engaging, personalized business applications that can be continuously updated to adapt to business changes in real time.




Lightweight, powerful, easy to use, UML tool
Software Ideas Modeler is a lightweight and powerful CASE tool. It supports UML 2.2 diagrams and a lot of other ones. Software Ideas Modeler is freeware (for non-commercial use). Commercial user may use this software only after buying.

The PlantText tool is an online tool for quickly creating UML (Unified Modeling Language) diagrams. Unlike most tools, PlantText can build diagrams without the use of a mouse because it is based on PlantUML markup language.

NClass is a free tool to easily create UML class diagrams with full C# and Java language support. The user interface is designed to be simple and user-friendly for easy and fast development. Properties, enums, delegates and other language specific elements are fully supported...



Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams. Completely free. Cross-platform. Violet is intended for developers, students, teachers, and authors who need to produce simple UML diagrams quickly.

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.




Open source tool that provides methodological guidance, intuitive model editing, and viewing capabilities for Systems, Software and Hardware Architects.




UML Designer provides a set of common diagrams to work with UML 2.5 models. The intent is to provide an easy way to make the transition from UML to domain specific modeling.


With YAKINDU Statechart Tools, you can easily create complex systems in a visual way. Simulate and test your system’s behavior already while you are modeling.

UMLGraph allows the declarative specification and drawing of UML class and sequence diagrams. The current features are part of an ongoing effort aiming to provide support for all types UML diagrams.

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.



