The PC GAMESS/Firefly is a freely available ab initio and DFT computational chemistry program. PC GAMESS/Firefly shares lots of functionality with the GAMESS(US). All the functionality of October 25, 1999 release of GAMESS (US) is supported. Many additional features added to GAMESS (US) since 1999 are supported as well. PC GAMESS/Firefly extends functionality of the GAMESS(US) program by providing very fast Moller-Plesset second, third and fourth order correlation corrections based on the self-consistent electron pairs (SCEP) theory.
Versions PCGamess 7.10 a PCGAMESS 7.1e
It is necessary to agree with a licence
Load modul ("module ad pcgamess-7.1" for version 7.10) or ("module ad pcgamess" for version 7.1e) and run program.
Online version: http://classic.chem.msu.su/gran/gamess/index.html