Yes, I know, draw.io theoretically isn’t entirely open source, but the source code is available and it can be self-hosted. Honestly, that’s good enough for me, I think I can make an exception for this one. But generally I care a lot about strictly using FOSS too. It can also be integrated with Nextcloud: https://apps.nextcloud.com/apps/drawio
There’s also a draw.io (diagrams.net) plugin for intellij and probably eclipse.
Vscode too
Maybe mermaid fits your use case?
There’s kroki as well, which includes Mermaid, Excalidraw, GraphViz, PlantUML, etc.
See also Inkscape.
Doesn’t quite fit OPs want of self hosted, but still very good.
There is also Asymptote and tikz for more technical stuff.
Draw.io has a Docker container
I used to use one years ago called yEd graph editor. Supremely amazing. It is free to use, but I don’t think it’s open source.
By no means the best option, but the tikz latex package works and pandoc can handle the conversion to your preferred format. I would limit this to very simple diagrams.
Inkscape works well for this.
Does inkscape have diagram connecting? One of the best draw.io features is the wide array of premade shapes, styles, and auto connecting for flow visualization
You are aware that draw.io is itself open source and self-hostable: https://github.com/jgraph/drawio ?
“This project is not an open source project as a result.”
https://github.com/jgraph/drawio/blame/dev/LICENSE <-- that’s … a rather specific and recent change. Is there a story here ?
Weird because gliffy (or whatever it’s called) exists on confluence
They added:
- None of the Work may be used in any form as part, or whole, of an integration, plugin or app that integrates with Atlassian’s Confluence or Jira products.
Amazing. I get there’s some atlassian bullshittery behind that.
Looks like their paid confluence extension was called a scam in a review and they really did not like that 😂 https://github.com/jgraph/drawio/discussions/4623
Yed is pretty good. It’s what I use.
I’ve used Dia for years, great simple tool for diagramming & if I need something more I’ll switch to graphviz dot files
D2lang is good
What kind of diagram are you going to make?
Graphviz
