Features include:

• Source code freely available.
• Easy to use; full wizard included for creating new volumes.
• Data encrypted on your PC can be read/written on your PDA, and vice versa.
• Powerful: Supports numerous hash/encryption algorithms, and provides a greater level of flexibility than a number of other (including commercial!) OTFE systems.
• Hash algorithms include: MD5, SHA-512, RIPEMD-160, Tiger and many more.
• Cyphers include AES (256 bit), Twofish (256 bit), Blowfish (448 bit), Serpent (256 bit) and many more.
• "Portable mode" included; FreeOTFE doesn't need to be installed before it can be used
• making it ideal for carrying your data securely on USB drives!
• Operates under both PC (MS Windows 2000/XP) and PDA (Windows Mobile 2003/2005) platforms.
• Linux compatibility (Cryptoloop "losetup", dm-crypt and LUKS supported).
• "Hidden" volumes may be concealed within other FreeOTFE volumes, providing "plausible deniability".
• FreeOTFE volumes have no "signature" to allow them to be identified as such.
• Encrypted volumes can be either file or partition based.
• Modular design allowing 3rd party drivers to be created, incorporating new hash/cypher algorithms.
• Supports password salting (up to 512 bits), reducing the risks presented by dictionary attacks.
• Allows users to backup and restore the critical areas of volume files.
• Keyfile support included; store volumes and their associated metadata separately.
• Uses per-sector IVs, including support for ESSIV.
• Volume file timestamps and attributes are reset after dismounting, increasing "plausible deniability".
• Supports volumes files up to 2^63 bytes (8388608 TB).
• Plus more...!