TrueCrypt is an open source software to encrypt volumes of data. It even supports the creation of virtual encrypted volumes which is portable.

AES Crypt is an advanced file encryption utility that integrates with the Windows shell or runs from the Linux command prompt to provide a simple, yet powerfu…

DiskCryptor is a free and open-source full disk encryption system.

EncFS is a Free (LGPL) FUSE-based cryptographic filesystem. It transparently encrypts files, using an arbitrary directory as storage for the encrypted files.

FreeOTFE is an open source computer program for on-the-fly disk encryption (OTFE).

VeraCrypt is an open-source utility used for on-the-fly encryption (OTFE). It can create a virtual encrypted disk within a file or encrypt a partition.

Steganos Privacy Suite includes file encryption, password management, and more.

CipherShed is a planned source-available disk encryption program for on-the-fly encryption.

BitLocker is a full disk encryption feature included with Windows Vista and later. It is designed to protect data by providing encryption for entire volumes. …