Encrypto lets you encrypt files before sending them to friends or coworkers. Just drop a file into Encrypto, set a password, and then send it however you normally would — but this time with added security. It’s free for both Mac and Windows.
Boxcryptor is an easy-to-use encryption software optimized for the cloud. It allows the secure use of cloud storage services without sacrificing comfort.Discontinued
Boxcryptor has been acquired by Dropbox on November 29, 2022, and is no longer accepting new users. https://www.boxcryptor.com/en/blog/post/boxcryptor-and-dropbox-user-info/
Encrypts and protects your files on your machine, before they hit your disk and the cloud: Collaborate with others, end to end encrypted.
SecurStick is a free portable application that lets you carry encrypted files on your USB drive. You can use the drive on any computer to access and modify those files WITHOUT needing any administrator privileges.
Perfecto Encryptor will encrypt your data fast and securely! This unique program will help you to keep any of your files and folders in encrypted form. And only you will can decrypt your files.
nCrypted Cloud is a Privacy, Security, and Collaboration solution that gives users full control over their personal and corporate Dropbox data. nCrypted Cloud adds client side encryption to your Dropbox existing data, and does not require you to migrate or move your files.
DigiVault is a portable, file-based encryption software for Windows. It helps you create and manage encrypted file containers or repositories for storing confidential files. Repository files are not bound to its storage device, making it portable.