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

Secure File Vault
Secure File Vault is a file and folder locker software incorporating 128 bit encryption techniques. This data encryption software not only locks your 'Content Sensitive' files and folders quickly and professionally using 128-bit Thayer encryption, but also makes it unable for others to view or... It has security features like file locker,security vault, email encryption. ... Secure File Vault works with all versions of Windows :95, 98, 2000, ME, NT and XP. ... Each Feature designed for maximum simplicity, security and utility.
http://www.securefilevault.com/securefilevault.exe - 2Mb - Download - Screenshot

BLS PDF CONVERT
Convert text, RTF, MS Word ,MS Write,MS Works to pdf format . Encryption with Adobe Standart ( 128 Bit , encryption properties , permission ... ) . Batch convert files .
http://www.bluelabelsoft.de/files/blspdfconcertsetup.exe - 1Mb - Download - Screenshot

DLOCK2
DLOCK2 is a simple command line file encryption/decryption utility program that uses the free Diamond 2 Encryption Algorithm. Full source code and documentation of the algorithm and the master's thesis it is based on are included. It compiles with Gnu C++ and other compilers, so it can be... You may use the included encryption/decryption source code in your own products at no charge. ... The encryption key may be a passphrase on the command line or it may be contained in a file. ... This software is free, however you may send the author donations to express appreciation if you like.
ftp://cryptography.org/pub/dlock201.zip - 573Kb - Download

R-Guard
To extend data protection beyond the limited scope of standard Microsoft Windows security services R-Guard allows users to set access rights not only for users but for applications and system processes as well. R-Guard Host based Intrusion Detection System shields users? ... For robust and rapid encryption R-Guard uses the industry standard AES encryption algorithm with the 256-bit key and transparent True-On-The-Fly-Encryption technology. ... R-Guard features also include real time Files Monitoring, Files Operations Audit and Encryption.
http://www.r-tt.com/downloads/rgr_en_2x.exe - 3Mb - Download - Screenshot

BlowFish 2000
BlowFish is a small, easy to use, file encryption utility. Simply drag and drop files and folders to quickly protect your sensitive documents, and then enter an encryption key to encode and decode the files you want to protect from prying eyes. Files can also be quickly encrypted and decoded... This utility uses the Blowfish encryption algorithm. ... BlowFish can be configured to optionally place its program icon in the taskbar notification tray.
http://www.gregorybraun.com/BLOWFISH.ZIP - 1Mb - Download - Screenshot

Home CHAOS
Home CHAOS is a fast and very easy-to-use program which is able to encrypt and decrypt files of every type and even whole directory structures. For this it uses strong encryption, encryption acknowledged worldwide to be un-breakable.
http://safesofthome.com/counter/download.asp?file=hoc.exe - 483Kb - Download - Screenshot

Xceed Encryption Library
Xceed Encryption Library is an ActiveX component that allows Windows applications to encrypt and decrypt data using the latest industry standard strong encryption algorithms. It supports traditional secret-key encryption as well as public-key encryption, and can encrypt/decrypt memory buffers,... For traditional strong encryption, the library supports the newly adopted AES (US Advanced Encryption Standard) secret-key encryption algorithm (Rijndael), which uses 128, 192 or 256-bit keys. ... It also supports the Twofish encryption algorithm, a runner-up for AES.
http://www.download.xceedsoft.com/XceedEncryption.exe - 16Mb - Download - Screenshot

CryptoExpert Express
CryptoExpert Express is easy to use on the fly encryption software with user friendly interface.
http://www.cryptoexpert.com/express/download/cexpertxp_setup.exe - 851Kb - Download - Screenshot

SafeHouse Hard Drive Encryption
SafeHouse provides transparent on-the-fly encryption for your notebook or desktop personal computer. Using SafeHouse, you can allocate portions of your existing hard drives to be reserved for encrypted data. SafeHouse encrypted volumes appear on your PC as another Windows drive letter. ... All encryption is performed automatically and transparently on the fly. ... You can do anything with a SafeHouse virtual drive that you can do with a normal hard drive; only that with SafeHouse, the encrypted volumes require password authentication before the files become accessible.
http://www.pcdynamics.com/ftp/security/safeh210.exe - 2Mb - Download - Screenshot