Top 18 open-source products relevant to Flowcharts and Diagrams

Online diagramming application.

Open Source

Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.

Open Source freemium $7.0 / Monthly

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

Open Source

Single-user mockup / wireframing / diagramming tool.

Open Source

Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.

Open Source

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

Open Source

D3-based reusable chart library that enables deeper integration of charts into web applications.

Open Source

Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom.

Open Source

Create beautiful diagrams just by typing notation in plain text.

Open Source

js-sequence-diagrams turns text into UML sequence diagrams.

Open Source

Textik is a free ASCII diagrams editor which allows you to create any text-based ASCII diagram.

Open Source

TikZiT is a graphical tool for rapidly creating graphs and string diagrams using PGF/TikZ.

Open Source

Flowgorithm is one of the alluring flowchart programming languages that come with the capability of simple graphical flowcharting.

Open Source

nomnoml is a free and open source tool to generate nice looking UML diagrams from simple text definitions.

Open Source

gg is a free online diagram editor for flowcharts, process diagrams and network diagrams. It is also a light software architecture simulator.

Open Source freemium

Draw SVG flow charts from simple text representations of the diagrams.

Open Source

Diagrams is a powerful, flexible, declarative domain-specific language for creating vector...

Open Source free

Graphia is a powerful open source visual analytics application developed to aid the interpretation of large and complex datasets.

Open Source