Halite
High-level cryptography interface powered by libsodium
...You can read the Halite Documentation online. Halite is released under Mozilla Public License 2.0. Commercial licenses are available from Paragon Initiative Enterprises if you wish to extend Halite without making your derivative works available under the terms of the MPL. If you are satisfied with the terms of MPL software for backend web applications but would like to purchase a support contract for your application that uses Halite, those are also offered by Paragon Initiative Enterprises.