draw.io is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams.
Online diagram and flowchart software that supports Microsoft Visio import and can work on any operating system.
Dia is a GTK+ based diagram creation program for Linux, Unix, Mac OS X and Windows released under the GPL license.
yEd is a powerful diagram editor that can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just...
An online diagramming tool with built-in productivity features to create diagrams faster. Draw flowcharts, mind maps, org charts, network diagrams, Venn diagrams and 50+ other diagrams types. Readymade templates to get started fast.
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
ConceptDraw PRO v11 is the only product that supports Visio legacy, runs on macOS and Windows, and is a perpetual license. Import/Export VDX, VSDX, VSSX and Import VSD, VSS files.Create any business graphics, diagrams, floor plans and flowcharts. .
Cacoo is a user-friendly online diagramming tool that allows you to create a variety of diagrams such as wireframes, flowcharts, UML diagrams, network diagrams, mindmaps...
Creating flowcharts, organizational charts, business diagrams, science illustration, network diagrams, mind map and lots more.
StarUML is a program to develop fast, flexible, extensible, featureful, and freely-available UML/MDA platform running on Win32 platform.
The last stable release from the developers was released on December 15, 2011.
ArgoUML is an open source UML modeling tool and includes support for all standard UML 1.4 diagrams. It runs on any Java platform and is available in ten languages.
Visual Paradigm for UML (VP-UML) is a UML design tool and UML CASE tool designed to aid software development.
UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and...
Lightweight, powerful, easy to use, UML tool
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
The website expired for some time. Now it's up again but in Chinese only, no other languages are available.
Free html-5 based on-line diagrams design, an ideal tool for visual communication .
Discontinued from September 2018.Cannot be downloaded anymore.
Astah Community is an add-on tool for your UML that is ready to use the instant you download it, allowing your UML to be quickly and easily enhanced, and refining your development process with Astah's innovative modeling approach.
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...
Creately Desktop is a collaborative diagram software that allows you to create flow charts, UML diagrams, wireframes, mockups, mind maps, sitemaps or just about any other diagram...
Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams. Completely free. Cross-platform.
NClass is a free tool to easily create UML class diagrams with full C# and Java language support.
SAP PowerDesigner: Enterprise Architecture tools for digital transformation success
The free to use, open source toolkit YAKINDU Statechart Tools (SCT) provides an integrated modeling environment for the specification and development of reactive, event-driven...