Fort is a file encryption tool which uses AES-256 to secure your most confidential files.
Explorer integration makes the program generally easy to use. Right-click a file or folder, select Encrypt and enter a passphrase to encrypt it, choose Decrypt and enter the same passphrase to decrypt it: simple.
Extras include an option to generate a secure passphrase at a click, and a launcher to the Windows On-Screen Keyboard which might help you bypass keyloggers.
By default, Fort creates a backup of the original file before encryption, which might not always be convenient. Fortunately you can turn this off in the Settings dialog.
What's new in v3.2 (see changelog for more)?
Fort standalone now knows files user encrypted via the shell extension.
Files can be now opened directly from the Fort standalone.
Fixed missing tooltip text in the About-button
Installing license can be now done also from the About-dialog.
Minor changes how file extensions are handled in some situations.
Added Korean, Italian and Polish translations.
FortMachine library is now available as open source under the MIT license.
It's not exactly feature-rich, but Fort provides the core tools you need, and overall it's a simple way to protect your data.