1)   QuickCrypt Library 2.50
Fast, highly optimized implementation of symmetric (private-key) encryption algorithms: DES, Triple DES (3DES), DESX, BLOWFISH, RIJNDAEL (AES-Advanced Encryption Standard),GOST. Allows to encrypt/decrypt files, memory blocks, strings, streaming data.

 2)   Abacre File Encryptor 1.0
Encrypt any files or folders using 39 advanced encryption algorithms. Other features: Secure Password Generator; Text Pad to encrypt any text; Wipe Files command to permanently remove files your computer; command line parameters; Shell integration.

 3)   1-abc.net File Encrypter 2.00
1-abc.net File Encrypter protects files of any file type with a personal password. 6 symmetrical and asymmetrical encryption methods are available, and all of them can be combined with each other. Use this program to secure your privacy!

 4)   LetEncrypt 1.0.0.0
Encrypt your text files with unlimited high levels of encryption algorithms. - LetEncrypt shows you the level of encryption through a security meter. - Encrypt your text file by using unlimited ways. - Import/Export your encryption settings.