I found three when I had to do this. None of them worked correctly, and the JQuery plugin I found had a very poor API. I ended up writing my own, because the ba

I found three when I had to do this. None of them worked correctly, and the JQuery plugin I found had a very poor API. I ended up writing my own, because the bar set by the existing software was so low. Filepicker.io was one of the ones I looked at, and I still think my implementation was better. I wish I had smuggled a copy of it out of that company before I was laid off. :(