My main purpose is to simulate excited state calculations on a molecule with Time Dependent DFT.
I am looking for free software that makes input files for GAMESS. I have tried Avogadro and it works fine (in Extensions> GAMESS > Input Generator > Advanced tab) but it can not make TD-DFT input codes.
I also checked the recommended software by the Gordon Group (here) and tried installing some of them but couldn't install Gabedit at all (I was unable to compile the binary, maybe because I am using Mac OS X Yosemite). I also tried WebMO but it is available just on iTunes for iOS.
What I need is a software that makes the input code interactively to avoid possible errors.