drawio

You are conflating "open source" with "open contribution". https://github.com/jgraph/drawio#open-source-not-open-contri... explains it neatly: > Similar to SQLite, diagrams.net is open source but closed to contributions. > The level of complexity of this project means that even simple changes can break a lot of other moving parts. The amount of testing required is far more than it first seems. If we were to receive a PR, we'd have to basically throw it away and write it how we want it to be implemented. > We are grateful for community involvement, bug reports, & feature requests. We do not wish to come off as anything but welcoming, however, we've made the decision to keep this project closed to contributions for the long term viability of the project.

Draw.io is amazing! It has now been renamed to diagrams.net: https://app.diagrams.net/ Github repo: https://github.com/jgraph/drawio It's very easy to self-host, especially on Github Pages: https://github.com/jgraph/drawio#running There's also desktop apps for Windows, GNU/Linux, Mac and Chrome OS: https://github.com/jgraph/drawio-desktop/releases/latest

This was a problem for us and the lack of the ability to switch off PRs continues to cause problems. Community submissions are virtually always throw away, particularly on a complex code base. We ended up saying it's a legal problem [1], which it partly is. But throw away not only because of quality issues, always because of project scope issues. Yes, you feel the project is completely useless unless emoji icons animate in diagrams. That's great, fork the project and kill ours off by adding the feature (which they won't and it won't). When you know what the project scope is, tight enforcement of that scope is critical to prevent the complexity of the project from running away and ultimately killing the project entirely. https://github.com/jgraph/drawio