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Gleek.io

Gleek is a diagramming tool written by and for software developers. Based on a simple scripting language with full IDE functionality, Gleek lets you focus on architecture concepts while it handles the tedium of drawing diagrams.

20 Alternatives To Gleek.io

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Cacoo

A cloud-based diagram maker for companies, teams, and you.

Creately

Share. Reuse. Innovate.

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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Figma

Team-based interface design, Figma lets you collaborate on designs in real time.
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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.

GraphUp

Create diagrams using simple code instead of frustrating drag-n-drop apps and share it in one click in Notion, GitHub, Jira, Confluence…
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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.

PlantUML

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

Instead of starting with a blank screen, SmartDraw gives you the exact template you need.

Software Ideas Modeler

Lightweight, powerful, easy to use, UML tool

Terraform

Tool for building, changing, and versioning infrastructure safely and efficiently.
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Tilda Publishing

Tilda is a platform to produce landing pages, blogs, webpages through its responsive page builder.

Umbrello

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

Simplify and communicate complex information using data-linked diagrams.

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.

WebSequenceDiagrams

WebSequenceDiagrams is a web-based application that allows the user to use a proprietary language to define sequence diagram.

XMind

XMind is a brainstorming and mind mapping application.
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Zoho Creator

Business mobile app creation, development and sharing
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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.