title: Looking for a REST-based remote filesystem
body: <p>This is a very open/general question (I hope not too general anyway:))</p>
  
  <p>I'm looking for a library/module that could be plugged in a web server (like apache) and handle REST requests to store / retrieve / delete files.
  Something like Amazon's S3 or Windows Azure storage, but open-sourced.</p>
  
  <p>Does such a thing exist?</p>