Does anyone know of an open source linux app to create Sankey diagrams?

I attached an example, but ideally I'm looking for something where the flows not only go horizontal, but also vertical.

Boosts appreciated!
edit: they're called Sankey diagrams!

Dear lazyverse: is there an XML validation tool using RelaxNG compact schemas that I can install on Fedora and that doesn't depend on Java? Assume I know about jing and rnv

Yo, #lazyverse, what's everyone doing about the 32-bit #epoch time bug? I know what it is and its consequences, but how is it being fixed? Sources, please? #unix #linux

Dear #Lazyverse: Are there any #Fediverse #Android clients that allow multiple columns in landscape mode? (Particularly when using a larger tablet-based UI.) Basically similar to the web "advanced" view. #Mastodon