MSpin-JCoupling. A modular program for prediction of scalar couplings and fast implementation of Karplus relationships.

MSpin-JCoupling is a modular program for the prediction of scalar couplings using a large variety of Karplus relationships. The program was specially designed for small molecule analysis and can be run in graphical or command-line mode. The architecture of the program is highly modular, and new equations can be rapidly implemented, through a complete C++ programming interface, and deployed as run-time loadable plugins.