These submissions/threads have been cropping up a bit lately. But I have yet to seen anyone comment on pikchr, https://pikchr.org/ (NOTE: doesn't have as close of a relation to UML as Plant UML)
After what felt like endless googling it is what I decided to spend some time with, haven't had time to do much yet so can't say how it performs for me but the idea and execution really resonates with me.
After what felt like endless googling it is what I decided to spend some time with, haven't had time to do much yet so can't say how it performs for me but the idea and execution really resonates with me.