Gaphor

Gaphor is a Python-based, open source, multiplatform and multipurpose modeling application for creating nice UML diagrams for documentation.

18 Alternatives To Gaphor

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Blue Triangle

Blue Triangle’s analytics platform uncovers issues on your website measurably impacting your revenue and helps you fix them.

CloudShare

ClousShare provides a cloud-computing platform for developing and testing IT applications, software and systems.

CollabNet

ArgoUML, free and safe download. ArgoUML latest version: Open-source diagramming application for personal computers. ArgoUML is a program that allows users to create complex and professional diagrams.

Dia

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
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Gephi

Gephi is an open-source software for visualizing and analyzing large networks graphs.
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Gliffy

Gliffy is a powerful HTML5 online diagram maker. Create a flow chart, network diagram, UML diagram, organizational chart or wireframe with ease.
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LucidChart

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

ObservePoint

Monitor, test and validate the accuracy of your web tags, critical user paths and more with ObservePoint’s automated Data Quality Assurance solution.

PlantUML

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

Software Ideas Modeler

Lightweight, powerful, easy to use, UML tool
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StarUML

StarUML

UMLGraph

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
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UMLet

UMLet - Free UML Tool for Fast UML Diagrams

Umbrello

Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE.
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Vis

A vi-like editor based on Plan 9’s structural regular expressions.

Visual Paradigm

Looking for an affordable software with Enterprise Architecture tool, PMBOK tool, UML tool, Agile tool, BPMN tool and UX tool? Read this page for details.
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yEd Graph Editor

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.