Dropbox offers a simple way to exchange files between Macs, PCs and iPhones/iPads, store files in the cloud or back things up. BoxCryptor adds one great feature by offering you a secure, i.e. encrypted folder (well, volume actually) in your Dropbox. There’s a limited free application for Mac, PC and iOS if you use the service for private purposes only. BoxCryptor helps you to create a volume in your Dropbox (looks like a regular folder), set a password and then secures your files with an AES-256 encryption. That way only you can access the volume. This might be handy for storing private documents like a copy of your passport and other travel documents while circling the globe.