There are a variety of online companies such as LegalZoom and RocketLawyer that can prepare Separation Agreements for you for minimal fees. I strongly encourage people NOT to use these online legal services for a variety of reasons. Am I biased yes, but am I saying this just because I want your business? Absolutely not!
One of the greatest roles of an attorney is as an advisor. Most clients need help figuring out how to best proceed in their case. More often than not clients will make changes to their intended plan after we meet and discuss pros and cons of each decision. Helping them walk through the decision making process is where there is great value in having an attorney vs. online document preparation company.
I also tell them about a few mistakes I've personally seen with online document prep company that cost the client much more to fix than having it done properly the first time. If it's able to be fixed at all. Sometimes a clearly dependent spouse will waive her right to alimony or settle for an amount of child support that is below what the North Carolina Child Support Guidelines call for. I've also seen people waive their right to the other spouse's retirement when they would normally be entitled to half of it.
So I tell people online document company could work for you if you have a very plain and simple life. But most people don't.