Data Encryption Toolkit

From Sergey Shevchenko:

This program allows you to use 5 well-known and highly secured encryption algorithms (Blowfish, DES etc.). DET will help you to encrypt single files, groups of files or the whole folders, including all its subfolders, easy and quickly. You can work with encrypted folders as simply as with usual folders (except entering the unlocking password). All encryption and decryption actions will be done on fly. The program is integrated into any Windows shell and all its functions are available from the context menu. Besides encryption the program has some additional features. DET has a high speed, is easy to setup and to use.