Creates a set of thumbnails from a set of dropped images, downloadable as a zip.
You can see the live version here: http://makethumbnails.com/#dropzone
And there is a video demo on the YouTube: https://www.youtube.com/watch?v=MrN1ujTHTHI
Uses Stuart Knightley's JSZip: http://stuk.github.io/jszip/ and Eli Grey's FileSaver: https://github.com/eligrey/FileSaver.js/
It was tested in Chrome, Firefox, Opera and Safari on OSX. I also showed it to a cat and it approved.
Yes, this doesn't work on a mobile. I dare you to drag and drop images into a browser on a mobile though and download thumbnails as a zip - it's a use case thing. This is live and such - all gulping and grunting was done by me, not by any script.