Cloudfogger

Cloudfogger is a tool that encrypts your data on the local device before it gets uploaded to the cloud.

That guarantees that Dropbox and others never get access to the content of your files. The app protects your privacy with 256bit AES (Advanced Encryption Standard) encryption. On the local system you still access your data as you always did, while all files are securely encrypted when they get uploaded to the cloud.