officEEnigma

officEEnigma is a lightweight and portable software application that provides a very simple method for encrypting messages and sending them to your friends. It does this with the help of a passphrase that you specify, and the secret messages can be decoded only by those who know the keys and are running the same program.

No installation necessary

Since there is no setup pack involved, you can drop the executable file in any part of the hard disk and just click it to launch the utility. Otherwise, you can keep it stored on a USB flash drive in order to directly run it on any PC with minimum effort and no previous installers. More importantly, it doesn't modify Windows registry settings.
It's wrapped in an outdated interface made from a small window with a rudimentary look, where you can seamlessly figure out officEEnigma's settings.

Seamlessly encrypt and decrypt messages

After entering a secret passphrase and message content, you can click a button to instantly cipher the text, as well as launch the default email client to send it to your friends.
Deciphering the message is just a easily done. Although officEEnigma gives you the possibility to cipher an encrypted message as many times as you want, our tests have shown that this doesn't deliver accurate results. We've noticed that certain characters get lost in translation.

Evaluation and conclusion

There were no stability issues in our tests, thanks to the fact that the tool didn't freeze, crash or prompt error messages. As we expected, it had minimal impact in our tests, running on low CPU and memory.
On the other hand, officEEnigma has an outdated interface and just a couple of basic options for encrypting and decrypting text. Nevertheless, you can test it for yourself, since it's free.