[josephernest]

BigPicture might be what you're looking for: http://bigpicture.bi/demo

* Infinite canvas

* Infinite zooming

* WYSIWIG

* Demo

* Opensource: https://github.com/josephernest/bigpicture.js

If you zoom on some vegetables here http://bigpicture.bi/Legumes you'll find the recipe :)

[nikofeyn]

that big picture website is hardly usable on an iPad.

[josephernest]

Mobile not supported for now.

But on the other hand, there's nearly no equivalent tool available nowadays ;)

[lookACamel]

What about sketchboard.io?