Apparatus: graphics editor and programming environment for interactive diagrams
aprt.us
aprt.us
And credited so: http://aprt.us/#development
Looks cool, on a plane without a PC. Will have to try it out when I land.
I'm a guy who types in SVG diagrams manually. They're normally simple enough and it's easier to get the alignments when you type in the coordinates. But tools like this could change it. I'll keep eyes on this. Thanks for sharing.
It's kind of cute. It's more like a proof of concept, or minimal viable product, at this point. Bring it up to the level of Inkscape, so you can do most of the things .svg files can represent, and it will be useful.
(Inkscape is a great piece of free software, one of the few pieces of free graphics software on Linux that doesn't come from a command line mindset. Also runs on Windows and Mac.)