Draw.io My go-to option for diagrams Draw.io, often known as diagrams.net, is one of the best open-source diagramming tools that rivals and often surpasses commercial offerings like Microsoft Visio.

Produced by Jgraph Ltd, draw.io (also known as Diagrams.net) was first released under an Apache license in 2017. It has a repository on GitHub, although only the core is open source, and external ...

mxgraph is another open source, pure JavaScript, client-side library for creating interactive diagrams that renders to SVG and HTML and it’s free! The authors explain: ...