There is VeraCrypt, a fork of TrueCrypt 7.1a. It still works at least on Windows and OS X (I didn&#x27;t check GNU&#x2F;Linux).<p><a href="https:&#x2F;&#x2F;veracrypt.codeplex.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;veracrypt.codeplex.com&#x2F;</a>