Columbus

https://www.univie.ac.at/columbus/

Open source: YES

Methods available (non-exhaustive list):

  • Single Reference Methods: SCF
  • Multireference methods: MCSCF (multiconfiguration self-consistent field), MR-CISD (multireference configuration interaction with all single and double excitations), MR-ACPF (multireference averaged coupled-pair-functional), MR-AQCC (multi-reference average quadratic coupled-cluster)
  • Spin/Orbit MRCI

 

Other features:

  • Interfaced with Molcas