SafeIT File Encryption
SafeIT File Encryption is a user-friendly program that allows you to prevent unauthorized access to restricted documents. Encrypt sensitive documents and other private digital information you have on your computer. The encrypted files are are only accessible by entering the correct password. ... The encryption technology used supports several encryption algorithms, including the new AES-standard Rijndael with key length of 256 bits. ... Choose format between ZIP, SAFE, EXE, JAVA or HTML. ... If you prefer, you can also use Blowfish with a key length of 480 bits.
http://www.safeit.com/downloads/SafeITFileEncryption.exe - 8Mb - Download - Screenshot

VNP SECRET
The programme is build according to a simple general rule: it operates on single files. Therefore accidental deletion of a file or a loss of password minimises the losses. The programme encrypts files using algorithms TRAP, ORM. BLOWFISH, RIJNDAEL.
http://ftp.vnpsoftware.com/pub/setup_secret.exe - 731Kb - Download - Screenshot

Stealth Storage
Stealth Storage is a small and powerful file encryption tool. It encrypts files on-the-fly using well-known strong ciphers like BLOWFISH, RIJNDAEL etc. It is totaly invisible when installed. Nobody will even notice there are encrypted files on a computer.
http://www.stealth-storage.com/stealth-storage.exe - 433Kb - Download - Screenshot

1Way
Convert any application into time-limited shareware. A function library offering a flexible locking system with solid encryption. Generate serial numbers to register your application. Test program included. Easy to implement. Support for VB, C++, Delphi, other languages. ... AES (Rijndael) 256 bit encryption.
http://www.atma-software.com/1way/1WaySetup.exe - 2Mb - Download - Screenshot

APP/Encrypt
APP/Encrypt is a COM+/MTS component that allows application developers to strong encrypting and decrypting of text and files. Supports the latest industry-standard strong encryption and hashing algorithms including: Blowfish, Cast 128, Cast 256, Rijndael, Serpent, Twofish, TEA, MARS, IDEA,...
http://nonnoi.com/download/appencrypt.zip - 333Kb - Download - Screenshot

ASP/Encrypt
ASP/Encrypt is a server side COM component that allows web developers to strong encrypting and decrypting of text and files. Supports the latest industry-standard strong encryption and hashing algorithms including: Blowfish, Cast 128, Cast 256, Rijndael, Serpent, Twofish, TEA, MARS, IDEA, Haval,...
http://nonnoi.com/download/aspencrypt.zip - 323Kb - Download - Screenshot

FileEncryptor
FileEncrypter is a small freeware utility that is capable of encrypting any file on any media storage with the officially recognized encryption algorithm - AES (Rijndael). The key length of the algorithm may vary from 128 to 256 bit to ensure the maximum protection of encrypted information. ... The use of FileEncryptor will help you to keep all important files safe no matter what happens because AES encryption algorithm has been proven to be unbreakable.
http://www.arxsoft.com/download/FileEncryptor1.msi - 388Kb - Download - Screenshot

1Crypt
A quick and professional way to add strong encryption to your application. 1Crypt is a function library (DLL) which allows you to easily and securely encrypt files, strings, and buffers using 256-bit Advanced Encryption Standard (Rijndael) encryption. ... Using strong encryption in your application doesn't have to be complicated.
http://www.atma-software.com/1crypt/1CryptSetup.exe - 625Kb - Download - Screenshot

CommuniCrypt Mail
Standalone eMail client with built-in strongest asymmetric Public-Key-Encryption with RSA encryption algorithm (RSAES-OAEP). Key length for encrypting up to 7120 bit. This eMail client is fully featured for receiving/sending mails via POP3/SMTP. With the integrated SMTP engine you do not need a... With the integrated file encryption/decryption tool you can encrypt or decrypt your mail attachments or all other files you like with strongest RSA Public Key encryption (key length from 338 bit up to 7120 bit) or with the symmetric AES Rijndael encryption (256 bit).
http://www.communicrypt.com/downloads/ccm_setup.exe - 5Mb - Download - Screenshot

NCrypt TX
This text based encryption tool allows easy message hiding, to be used in e-mail, messenger and other communications. NCrypt TX also has hashing capabilities to verify message integrity. It supports DES, Rijndael-AES, SHA, and MD5 algorithms, as well as historical algorithms such as ROT13 and... With NCrypt TX you can convert your text messages into a sequence of encrypted hexadecimal or Base64 characters.
http://www.littlelite.net/ncrypt/sw/NCryptTX19Setup.exe - 683Kb - Download - Screenshot