GAMESS is a free quantum package similar to Jaguar and Gaussian.
The official GAMESS website can be found here
The current version of GAMESS is GAMESS 04.
To run GAMESS 04, you have to insert the line
"alias gms 'nice +15 /net/igor/source/gamess/gamess/rungms' " in your .cshrc file.
The command for running GAMESS 04 is "gms input.inp >& input.out & "