[diafygi]

There's a few projects around the idea of not requiring a dynamic backend for webapps. The general term is "unhosted" (unhosted.org), and it mostly started as a reaction to the we-have-your-data-and-can-use-it-however-we-want websites. RemoteStorage.io is probably the most mature unhosted library, and there's a few other services listed on unhosted.org that are being actively working on.

I got attracted to this idea because it offers several security advantages. I've been working on a minimalistic javascript library (byoFS.com) that allows you to connect a Dropbox/Google Drive/etc. account and write automatically encrypted data to it. I tied for 2nd place at a recent privacy hackathon for making an encrypted chat application using only Dropbox accounts:

http://www.youtube.com/watch?v=WTPimUSIWbI