Apps similar to Software Ideas Modeler include Excalidraw, which is open source with a free version. Other options are Dia, Miro, Lucidchart and Microsoft Visio. You're spoiled for choice with UML Modeling Tools like Software Ideas Modeler: we list more than 50 alternatives for Windows, the web, Mac, Linux and Android.
UModel is a UML (Unified Modeling Language) software modeling tool from Altova, the creator of XMLSpy. UModel supports all 14 UML 2 diagram types and adds a unique diagram for modeling XML Schemas in UML.
Austria
EU
ckwnc is a uml sequence diagram creation tool that uses an intuitive c-style language to automatically create uml diagrams that can be saved as an image or embedded directly into other pages
A diagram editor for architecture, process and software diagrams. Runs in the browser or as a desktop app and saves diagrams as readable YAML.
PortugalEU
Inwardis keeps what you know about a system as a hierarchical model rather than separate diagrams. Every element can contain sub-elements, so a person or an AI agent opens one level, sees what matters there and drills into a single branch.
EstoniaEU
An easy business modelling app to help you concentrate on ideas generation and not drawing . Templates for your favorite models and more: Ansoff Matrix, BCG Matrix, Business Model Canvas, Customer Loyalty, Five Forces, Gartner Magic Quad, Generic Strategies, Johari Window...
United Kingdom
RadDiagram offers flexible and interactive diagramming layouts for your rich data-visualization applications. The framework tool set enables you to:
United States
ExcalidrawZ is a native Excalidraw client for Mac, iPad, and iPhone, designed for hand-drawn whiteboards, diagrams, sketches, visual notes, and technical explanations.
China
Merge Plan is a user friendly diagram application. It is fully compatible with most diagram file formats. It is a great value in comparison to other diagram applications. It is part of Merge Soft Office.
Archium is an interactive architecture model of your system created automatically from your distributed tracing data.
