Jenni, you are not new to the site and there is no reason why you wouldn't have known this - you made a very similar post when you joined and got very similar answers. I found 3 SW agencies in a couple of minutes just with that Google search and there will surely be others - there may also be someone with a thread in our Spamming section. Listing them individually and expecting public feedback is not appropriate - the Q&A board is not for free advertising.
Whether or not they are good to work for, you can only really find out by contacting them and seeing if their ways of working appear above board and the pay, hours etc suit you; most of us on here are independent and I'm not sure there are any agency ladies from that part of the country posting. There is plenty of general information on the board about good agency practice, attending interviews and so on if you use the Search box.