NaCl (pronounced "salt") is an easy-to-use high-speed software library for network communication, encryption, decryption, signatures, etc. NaCl's goal is to provide all of the core operations needed to build higher-level cryptographic tools.
Sodium is a portable, cross-compilable, installable, packageable fork of NaCl, with a compatible API.
The design choices emphasize security, and "magic constants" have clear rationales.
The same cannot be said of NIST curves, where the specific origins of certain constants are not described by the standards.
And despite the emphasis on higher security, primitives are faster across-the-board than most implementations of the NIST standards.
Sodium supports a variety of compilers and operating systems, including Windows (with MingW or Visual Studio, x86 and x64), iOS and Android.
A mailing-list is available to discuss libsodium.
In order to join, just send a random mail to sodium-subscribe {at}
pureftpd{dot}org.
See the LICENSE file for details.