Crypturn

Crypturn is a good solution for securely protecting your confidential files and documents. The program uses none other than the 448-bit Blowfish compression algorithm; much better than what you can usually find on the market nowadays.

But that's not the only advantage of using Crypturn; in addition, the program doesn't require installation and to make it work you just have to run the .EXE file. This feature lets you, for example, take Crypturn with you on a USB drive or memory card and run it on any computer.

Another interesting feature included in Crypturn is support for working from the command line. While this doesn't offer any practicality for the average user, it does allow it to be integrated in personal applications or scripts.