The aCrypt software allows the user to encrypt files and send them via email to others without the software.

A small and powerful freeware utility for encrypting files with the AES algorithm.

Multiple ciphers and key manager integrated with the Windows shell.

Web form to encode and decode ROT13, a simple letter substitution encryption scheme.

Encrypts files for archiving and sharing of parts of, or entire documents.

Professional task manager which allows for automatically performing various security-related tasks, such as automatic encryption, wiping, and system cleanup.

Open-source free on-the-fly disk encryption for Windows XP/2000. It can encrypt partitions or create virtual encrypted disks within files. Implemented ciphers: AES-256, Blowfish (448-bit key), 3DES, Serpent, Twofish. Provides plausible deniability.