Cryfs is an encryption program designed to work with cloud folders. It encrypts files separately so small changes do not require the entire encrypted bin to be re-uploaded. Works splendidly with Owncloud, Dropbox and the like.
I anticipate a smaller but thankful user-base of privacy minded individuals.
Link to tarball: https://github.com/cryfs/cryfs/archive/0.9.7.tar.gz