CCL:G: Operating system and a workload manager

 > which FREE operating system would you recommend? 
This made me pause. Are there so many choices of free OSes out there?
I counted Linux, FreeBSD and friends(NetBSD/OpenBSD...) and what else?
> well which FREE workload manager would you recommend?
If you mean batch scheduling system then there are Torque, SGE and, perhaps, DIET... It's not an overwhelming number of choices here either.

> We are planning to run Gaussian and AMBER software at the current time.
I think this requirement pretty much eliminates plan9, though I'm not
an expert.

Seriously though go with Linux and either SGE or Torque, it's not like there are so many free options out there.

Happy New Year,