Checked Oct 22, 2026Technical University of Munich
Apollon
An open-source web UML editor maintained at TUM, offering thirteen diagram types and real-time collaboration.
BrowserUMLOpen Source
Review tool Tool directory / 60 records
Explore modeling tools.
Start broad, then narrow the catalog by platform, standard, license, or modeling interface.
Checked Oct 22, 2026
Checked Oct 22, 2026Change Vision
Astah Professional
A mature commercial UML modeling tool, formerly named JUDE, with a plugin ecosystem and recent improvements to AI assistance, sequence diagrams, search, and collaboration.
Cross-platformUMLCommercial
Review tool 
Checked Oct 22, 2026ASysT project
ASysT Rendering — Modeler
An early-stage SysML v2 modeling tool available as a VS Code extension with standalone Windows and Linux editions.
WindowsLinuxSysML v2Freeware
Review tool 
Checked Oct 22, 2026BOUML project
BOUML
A cross-platform UML modeling tool with C++ and Java plugin support whose published update history ended in 2021.
WindowsLinuxUMLUnknown
Review tool 
Checked Oct 22, 2026Dassault Systèmes
CATIA Magic / Cameo SysML v2 Solution
A commercial SysML v2 solution in the CATIA Magic and Cameo product family, building on a long-established enterprise MBSE tool line.
WindowsLinuxSysML v2Commercial
Review tool 
Checked Oct 22, 2026clang-uml project
clang-uml
An open-source reverse-engineering tool that generates class, sequence, package, and other diagrams from C and C++ code in PlantUML, Mermaid, or JSON form.
WindowsLinuxUMLOpen Source
Review tool 
Checked Oct 22, 2026CS Odessa
ConceptDraw DIAGRAM
A long-running general-purpose diagramming application for macOS and Windows with UML libraries and Visio compatibility.
WindowsmacOSUMLUnknown
Review tool 
Checked Oct 22, 2026crystal-facet-uml project
crystal-facet-uml
An open-source Windows UML tool that keeps model elements, names, hierarchy, and relationships consistent across multiple diagrams.
WindowsUMLOpen Source
Review tool 
Checked Oct 22, 2026DeciSym project
DeciSym sysmlv2-gui
A lightweight open-source SysML v2 graphical viewer and editor implemented with Rust and egui.
LinuxSysML v2Open Source
Review tool 
Checked Oct 22, 2026JGraph
diagrams.net Desktop
The open-source Electron desktop edition of diagrams.net, a cross-platform drawing application with UML shape libraries and a matching browser edition.
WindowsLinuxUMLOpen Source
Review tool 
Checked Oct 22, 2026Easy UML Editor
Easy UML Editor
A commercial graphical UML editor delivered as an application for Confluence Cloud.
BrowserUMLCommercial
Review tool 
Checked Oct 22, 2026Eclipse Foundation
Eclipse Papyrus
An extensible Eclipse-based modeling environment for UML 2.5 and SysML 1.6, with satellite capabilities such as code generation.
Cross-platformUMLSysML v1Unknown
Review tool 
Checked Oct 22, 2026Wondershare
EdrawMax
A cross-platform general-purpose diagramming suite that supports UML, flowcharts, organization charts, network diagrams, ER diagrams, collaboration, and AI-assisted features.
BrowserWindowsUMLCommercial
Review tool 
Checked Oct 22, 2026Sparx Systems
Enterprise Architect
A commercial Windows modeling suite combining UML and systems modeling with requirements management, estimation, testing support, repositories, and team collaboration.
WindowsUMLCommercial
Review tool 
Checked Oct 22, 2026BackendSide
ERPDesk
A Windows modeling application for ER, class, business-process, and sequence diagrams with XMI support.
WindowsUMLCommercial
Review tool 
Checked Oct 22, 2026Gaphor project
Gaphor
An open-source graphical modeling environment implemented in Python with support for UML and part of SysML v1.
WindowsLinuxUMLSysML v1Open Source
Review tool 
Checked Oct 22, 2026Northwoods Software
GoJS
A commercial JavaScript diagramming framework that can be used to build UML class-diagram experiences in web applications.
BrowserUMLUnknown
Review tool 
Checked Oct 22, 2026IAR
IAR Visual State
A commercial UML-based embedded-systems design and testing tool that generates C or C++ code and documentation.
WindowsUMLCommercial
Review tool 
Checked Oct 22, 2026IBM
IBM Engineering Systems Design Rhapsody
A commercial model-driven development environment for real-time and embedded systems with UML, SysML, code generation, and architecture-framework support.
WindowsLinuxUMLSysML v1Commercial
Review tool 
Checked Oct 22, 2026IBM
IBM Rhapsody Systems Engineering
A commercial browser-based SysML v2 modeling environment distinct from the traditional desktop IBM Engineering Systems Design Rhapsody product.
BrowserSysML v2Commercial
Review tool 
Checked Oct 22, 2026itemis
itemis CREATE
A commercial state-machine modeling and multi-language code-generation tool formerly known as YAKINDU Statechart Tools.
Cross-platformUMLCommercial
Review tool 
Checked Oct 22, 2026JetUML project
JetUML
A lightweight open-source UML diagram editor derived from Violet UML and using JSON as its model storage format.
Cross-platformUMLOpen Source
Review tool 
Checked Oct 22, 2026kUML project
kUML
A model-oriented textual DSL built with Kotlin, covering UML, SysML v2, C4, and BPMN with desktop, web, command-line, and IDE integrations.
BrowserWindowsUMLSysML v2Open Source
Review tool 
Checked Oct 22, 2026LSP UML project
LSP UML
An open-source VS Code extension that derives UML class, sequence, activity, and use-case diagrams from a running language server.
Not specifiedUMLOpen Source
Review tool 
Checked Oct 22, 2026Dassault Systèmes
MagicDraw
A commercial team modeling environment for UML, SysML, BPMN, and UPDM that is now part of Dassault Systèmes.
Cross-platformUMLSysML v1Unknown
Review tool 
Checked Oct 22, 2026Mermaid Chart
Mermaid
A JavaScript-based diagram generator that renders Markdown-like text into flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, and use-case diagrams.
BrowserUMLCommercial
Review tool 
Checked Oct 22, 2026Modeliosoft
Modelio
An open-source UML and BPMN modeling environment with collaboration-oriented features and support for shared model storage.
WindowsLinuxUMLOpen Source
Review tool 
Checked Oct 22, 2026Moqups
Moqups
A browser-based collaborative drawing and prototyping tool that includes a UML stencil library.
BrowserUMLUnknown
Review tool 
Checked Oct 22, 2026DENSO CREATE
Next Design
A commercial systems and software modeling tool that defines languages and views through metamodels and provides UML and SysML extension packages.
WindowsUMLSysML v1Commercial
Review tool 
Checked Oct 22, 2026The Omni Group
OmniGraffle for iOS
The iPadOS edition of OmniGraffle, a general-purpose visual design and diagramming application with UML stencils.
iOSUMLUnknown
Review tool 
Checked Oct 22, 2026The Omni Group
OmniGraffle for Mac
A native macOS visual design and diagramming application with UML stencils.
macOSUMLUnknown
Review tool 
Checked Oct 22, 2026Eclipse Foundation
Papyrus Web
A browser-based evolution of Eclipse Papyrus for UML 2.5 modeling, extensible diagrams, and model-driven engineering workflows.
BrowserUMLOpen Source
Review tool 
Checked Oct 22, 2026PlantUML project
PlantUML
An open-source text-to-diagram generator that produces UML-style diagrams and integrates with many editors, documentation systems, and build workflows.
Cross-platformUMLOpen Source
Review tool 
Checked Oct 22, 2026PTC
PTC Modeler
An enterprise modeling product, formerly Windchill Modeler, with support for UML, SysML v1, and SysML v2.
WindowsUMLSysML v1Commercial
Review tool 
Checked Oct 22, 2026py2puml project
py2puml
An open-source reverse-engineering utility that creates PlantUML class diagrams from Python applications.
Cross-platformUMLOpen Source
Review tool 
Checked Oct 22, 2026Quantum Leaps
QM (QP Modeler)
A model-driven design tool for hierarchical state machines in real-time embedded software, with C and C++ generation for the QP framework.
WindowsLinuxUMLFreeware
Review tool 
Checked Oct 22, 2026IBM
Rational Software Architect Designer
IBM’s enterprise software architecture modeling product, positioned separately from the real-time and systems-engineering focus of Rhapsody.
WindowsLinuxUMLCommercial
Review tool 
Checked Oct 22, 2026macOSUMLUnknown
Review tool 
Checked Oct 22, 2026Christian Pauli
S(imple) U(ML)-statemodeler
A state-machine modeling tool available as a standalone editor or Eclipse plugin, with Java, C#, and C++ code generation.
Cross-platformUMLFreeware
Review tool 
Checked Oct 22, 2026Sinelabore
SinelaboreRT
A code generator that imports state-machine or activity models from XMI and produces source code for languages including C, C++, Java, C#, Python, Rust, Go, and JavaScript.
Cross-platformUMLSysML v2Commercial
Review tool 
Checked Oct 22, 2026SmartDraw Software
SmartDraw
A long-running general-purpose diagramming product that now provides browser-based collaborative UML drawing alongside flowcharts, network diagrams, floor plans, and other visual formats.
BrowserUMLCommercial
Review tool 
Checked Oct 22, 2026Dusan Rodina
Software Ideas Modeler
A lightweight commercial modeling application for Windows with support for UML, BPMN, and SysML.
WindowsUMLSysML v1Commercial
Review tool 
Checked Oct 22, 2026MKLabs
StarUML
A commercial cross-platform UML modeling application with an extension API, model validation, JavaScript code generation, and team-oriented capabilities.
WindowsLinuxUMLCommercial
Review tool 
Checked Oct 22, 2026State Machine cat project
State Machine cat
A text-based state-machine diagram generator with a compact DSL and support for compound states, entry and exit actions, transitions, and SCXML import and export.
BrowserUMLOpen Source
Review tool 
Checked Oct 22, 2026StateSmith project
StateSmith
An open-source state-machine code generator supporting multiple programming languages and several diagram-authoring workflows.
Cross-platformUMLOpen Source
Review tool 
Checked Oct 22, 2026SysGit
SysGit
A commercial collaborative systems-engineering platform centered on Git and the SysML v2 textual notation.
BrowserSysML v2Commercial
Review tool 
Checked Oct 22, 2026Sensmetry
Syside
A SysML v2 tool family combining VS Code textual editing, interactive graphical and grid views, and a Python API for model automation.
WindowsLinuxSysML v2Freemium
Review tool 
Checked Oct 22, 2026Systems Modeling community
SysML v2 Pilot Implementation
The official SysML v2 reference and pilot implementation, including textual editing, parsing and validation, a Jupyter kernel, visualization, standard libraries, and API support.
WindowsLinuxSysML v2Open Source
Review tool 
Checked Oct 22, 2026SysML v2 Studio project
SysML v2 Studio
An open-source VS Code extension for SysML and KerML text with validation, navigation, editable graphical views, bidirectional text updates, and Claude/MCP integration.
Not specifiedSysML v2Open Source
Review tool 
Checked Oct 22, 2026Jamie Duncan
SysML v2.0 Language Support
An open-source VS Code extension with language-server support, model and feature explorers, requirements tooling, traceability, and multiple SysML v2 views.
Not specifiedSysML v2Open Source
Review tool 
Checked Oct 22, 2026Eclipse SysON project
SysON
An open-source, browser-based graphical modeling environment designed natively for SysML v2, with growing textual import and export support.
BrowserSysML v2Open Source
Review tool 
Checked Oct 22, 2026Trufun
Trufun Modeling Platform
A China-developed modeling platform with stated support for UML 2.5 and SysML 1.6.
WindowsUMLSysML v1Unknown
Review tool 
Checked Oct 22, 2026KDE
Umbrello
An open-source UML modeling application from the KDE ecosystem, primarily distributed for Linux.
LinuxUMLOpen Source
Review tool 
Checked Oct 22, 2026Pacestar Software
UML Diagrammer
A Windows diagramming application supporting UML together with traditional flowcharts and network diagrams.
WindowsUMLUnknown
Review tool 
Checked Oct 22, 2026UMLet team
UMLet
A lightweight UML diagram tool available as a standalone application and through Eclipse and VS Code integrations.
WindowsLinuxUMLUnknown
Review tool 
Checked Oct 22, 2026Altova
UModel
A Windows UML tool focused on round-trip engineering, database modeling, IDE integration, and reverse engineering including sequence diagrams.
WindowsUMLCommercial
Review tool 
Checked Oct 22, 2026Umple project
Umple
An open-source model-oriented programming environment that combines textual and graphical modeling and generates Java, PHP, and Ruby code.
BrowserUMLOpen Source
Review tool 
Checked Oct 22, 2026Violet UML project
Violet UML Editor
A long-running lightweight UML diagram editor that resumed active updates in 2026.
WindowsLinuxUMLOpen Source
Review tool 
Checked Oct 22, 2026Visual Paradigm
Visual Paradigm
A broad commercial modeling suite with UML, use-case specifications, textual analysis, code-to-sequence reverse engineering, requirements management, reporting, and ArchiMate support.
Cross-platformUMLCommercial
Review tool 
Checked Oct 22, 2026WindowsUMLUnknown
Review tool No tools match those filters.
Try broadening the platform, standard, license, or interface selection.