libbde is a library and tools to access the BitLocker Drive Encryption (BDE) format. The BDE format is used by Windows, as of Vista, to encrypt data on a storage media volume.

Supported BDE formats:

BitLocker Windows Vista
BitLocker Windows 7
BitLocker Windows 8 (Consumer Preview)
BitLocker To Go
Supported protection methods:

clear key
password
recovery password
start-up key
FKEV and/or TWEAK key data
Additional features:

support for partial encrypted volumes
zeros out the BDE metadata, matches behavior seen on Windows
Work in progress:

Dokan library support
Multi-threading support