| [ASE](https://wiki.fysik.dtu.dk/ase) | ASE is a python package providing an open source Atomic Simulation Environment in the Python scripting language. From version 3.20.1 we also include the ase-ext package, it contains optional reimplementations in C of functions in ASE. ASE uses it automatically when installed. |
| [ASE](https://wiki.fysik.dtu.dk/ase) | ASE is a python package providing an open source Atomic Simulation Environment in the Python scripting language. From version 3.20.1 we also include the ase-ext package, it contains optional reimplementations in C of functions in ASE. ASE uses it automatically when installed. |
| [BEEF](http://suncat.stanford.edu/facility/software/functional) | BEEF is a library-based implementation of the Bayesian Error Estimation Functional, suitable for linking against by Fortran- or C-based DFT codes. A description of BEEF can be found at http://dx.doi.org/10.1103/PhysRevB.85.235149. |
| [BEEF](http://suncat.stanford.edu/facility/software/functional) | BEEF is a library-based implementation of the Bayesian Error Estimation Functional, suitable for linking against by Fortran- or C-based DFT codes. A description of BEEF can be found at http://dx.doi.org/10.1103/PhysRevB.85.235149. |
| [CheMPS2](https://github.com/SebWouters/CheMPS2) | CheMPS2 is a scientific library which contains a spin-adapted implementation of the density matrix renormalization group (DMRG) for ab initio quantum chemistry. |
| [CheMPS2](https://github.com/SebWouters/CheMPS2) | CheMPS2 is a scientific library which contains a spin-adapted implementation of the density matrix renormalization group (DMRG) for ab initio quantum chemistry. |
| [CoordgenLibs](https://github.com/schrodinger/coordgenlibs) | S
| [CP2K](https://www.cp2k.org/) | CP2K is a freely available (GPL) program, written in Fortran 95, to perform atomistic and molecular simulations of solid state, liquid, molecular and biological systems. It provides a general framework for different methods such as e.g. density functional theory (DFT) using a mixed Gaussian and plane waves approach (GPW), and classical pair and many-body potentials. |
| [CPPE](https://github.com/maxscheurer/cppe) | CPPE is an open-source, light-weight C++ and Python library for Polarizable Embedding (PE)1,2 calculations. It provides an easy-to-use API to implement PE for ground-state self-consistent field (SCF) calculations and post-SCF methods. A convenient Python interface is also available. |
| [cppe](https://github.com/maxscheurer/cppe) | CPPE is an open-source, light-weight C++ and Python library for Polarizable Embedding (PE)1,2 calculations. It provides an easy-to-use API to implement PE for ground-state self-consistent field (SCF) calculations and post-SCF methods. A convenient Python interface is also available. |
| [DFT-D3](http://www.thch.uni-bonn.de/tc/index.php?section=downloads&subsection=DFT-D3&lang=english) | DFT-D3 implements a dispersion correction for density functionals, Hartree-Fock and semi-empirical quantum chemical methods. |
| [DFT-D4](https://www.chemie.uni-bonn.de/pctc/mulliken-center/software/dftd4) | Generally Applicable Atomic-Charge Dependent London Dispersion Correction. |
| [dftd3-lib](https://github.com/dftbplus/dftd3-lib) | This is a repackaged version of the DFTD3 program by S. Grimme and his coworkers. The original program (V3.1 Rev 1) was downloaded at 2016-04-03. It has been converted to free format and encapsulated into modules. |
| [Dice](https://github.com/sanshar/Dice) | Dice contains code for performing SHCI, VMC, GFMC, DMC, FCIQMC, stochastic MRCI and SC-NEVPT2, and AFQMC calculations with a focus on ab initio systems. |
| [dkh](https://github.com/psi4/dkh) | Wolf, Reiher, and Hess's Douglas-Kroll-Hess relativistic correction at 2nd–4th order (http://www.reiher.ethz.ch/software/dkh-x2c.html) wrapped in CMake for Psi4 (https://github.com/psi4/psi4) |
| [gau2grid](https://github.com/dgasmith/gau2grid) | A collocation code for computing gaussians on a grid of the form: out_Lp = x^l y^m z^n \sum_i coeff_i e^(exponent_i * (|center - p|)^2) Where the returned matrix dimension are the angular momentum (L) by number of requested points (p). |
| [gdma](https://github.com/psi4/gdma) | Anthony Stone's GDMA (http://www-stone.ch.cam.ac.uk/programs.html) wrapped in CMake for Psi4 (https://github.com/psi4/psi4) |
