Assisted in building a Dropbox app that allows the user to choose to either store files in the normal Dropbox manner, or also solely in the cloud.
DoITLive
While, Stephen Thoma has done most of the work, I helped with a FUSE-based in-memory selective Dropbox client that downloads files on-demand and removes them afterwards. More information at https://github.com/Modoatk/DoITLive.