1. Bitcasa, inifinite storage,
http://www.bitcasa.com/
2. Ciphertite data backup,
http://www.ciphertite.com/
3. Dropbox, a file-storage and sharing service,
http://www.dropbox.com/
4. The Flud backup system,
http://flud.org/wiki/Architecture
5. GNUnet, a framework for secure peer-to-peer networking,
https://gnunet.org/