Method-Draw is a superb fork of the popular web-based SVG editor SVG Edit. You can try it here and the project is hosted on github here.

As a reminder, BlueGriffon embeds SVG Edit. As soon as I have time for that, I'll look more closely at Method-Draw to see if it could replace SVG Edit in BlueGriffon since I find its UI and the UX it induces quite nice.