Cloudfogger is the free all-in-one encryption solution for files on your computer, mobile devices, Dropbox and the Cloud.

Protect your online privacy with simple and secure AES encryption for all your files, no matter where they are.
Securely share files with others and even encrypt e-mail attachments with the included Outlook addin.

Cloudfogger encrypts all your files on-the-fly: After installation a new virtual drive will be added to your computer. Any file stored in that drive will automatically be encrypted and stored in a physical folder on your system - for example your Dropbox.
The Cloudfogger file format also supports sharing: You can grant access to other Cloudfogger users while still keeping full control on who is able to unlock your data.

Cloudfogger - File Encryption finally made simple!