MCASSIGN software for computer-aided assignments
Submitted by tycko on Thursday, March 1, 2018 - 20:00

Source code, executable files, instructions, and examples of input and output files for the lates version of the MCASSIGN program are available upon request from Rob Tycko at  This program can be used for computer-assisted resonance assignments from almost any types of multidimensional NMR spectra.  See J. Magn. Reson. volume 253, pp. 166-172, year 2015 for a description and other relevant references.

Spinach version 1.6
Submitted by mariabaias on Saturday, July 25, 2015 - 11:20

Version 1.6 of Spinach library is now available at New features:

1.       BFGS-Krotov and regularized Newton-Raphson GRAPE algorithms in the Optimal Control module (written by David Goodwin). Standalone direct and inverted BFGS and SR1 Hessian update modules.

2.       One-angle Lebedev and REPULSION grids, hemisphere and octant subsets for REPULSION grids.

SpinDrops Version 1.2
Submitted by mariabaias on Sunday, May 31, 2015 - 11:39

The new version 1.2.2 of SpinDrops is now available for iPad and iPhone at


Top 5 reasons to use the app?

Spin Drops Version 1.1.1
Submitted by mariabaias on Monday, November 10, 2014 - 08:34

"SpinDrops" is a free powerful app for visualizing spin dynamics on the iPad or iPhone. The updated version SpinDrops 1.1.1 can now now be downloaded from the app store at

Spin Drops Version 1.1
Submitted by mariabaias on Sunday, October 26, 2014 - 08:06

Spin Drops Version 1.1 free app from Steffen Glaser has been released at the app store
This new version of "Spin Drops" allows users to design pulse sequences and to explore the rich dynamics of up to three coupled spins.
Extensive help files include a tutorial, examples, challenges, information about the mathematical background of the DROPS representation etc.

Spinach library version 1.5
Submitted by mariabaias on Saturday, September 6, 2014 - 18:35

A new version of Spinach NMR / EPR simulation library is available. New features include:

1.       Improved side chain J-coupling estimation in the protein NMR module.

2.       Native Tensor Train / DMRG module.

3.       Explicit numerical pulsed field gradient and gradient sandwich functions.

4.       Periodic boundary conditions for the calculation of dipolar couplings in solid state NMR spectroscopy.

5.       Two- and three-angle REPULSION grids and an implementation of SHREWD method for spherical integration grid weight assignment.