TrueCrypt is an open source software to encrypt volumes of data. It even supports the creation of virtual encrypted volumes which is portable. Developed by TrueCrypt Foundation
License: Open Source
TrueCrypt is an open-source encryption tool that supports full disk encryption and hidden volumes, making it ideal for users requiring maximum security and privacy. In contrast, Cryptonite is more user-friendly and focuses on file and folder encryption, making it suitable for users looking for simpler, straightforward encryption solutions.