Diagram.codes Alternatives

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

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

Open Source

RealityMAX is the most powerful free 3D design collaboration platform, 100% online. Cooperate remotely with your colleagues on 3D projects and easily share your work with clients. Create Web3D and AR experiences in a snap, without a line of code.

Visit website freemium $40.0 / Monthly (Pro with up to 500 GB of storage space)

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.

Online diagramming application

Open Source

The #1 tool for creating diagrams from code for developers, analysts, and architects

freemium

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.

Using gleek.io you can quickly map out systems using easy-to-understand syntax, without the need to drag and drop. Give gleek.io a spin and leave cumbersome mouse-clicking behind.

freemium €10.0 / Monthly

Clean and fast online sequence diagram tool using scripting and Drag and Drop

Draw, LibreOffice, ODF, open standards, creative software, vector drawing

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

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.

Swimlanes.io is a simple free online tool for making sequence diagrams.

StarUML