Omega is a yeast lab located in Chicago, similar to Wyeast or Omega or several others. They have a variety of strains. I have had great success with their strains, and being a resident of the greater Chicago area, I am happy to support a local business.
Also, Saisonstein's Monster is a really nice saison yeast.
I started carrying their yeast in my shop when they first started selling homebrew pitch packs and have been thrilled with it. They have most strains that I care about.