There are tons of things that come under the heading of "home recording studio gear." I just found a handy little post that lists categories for recording gear, which could be a useful thing. Everyone knows about microphones or headphones. And I suppose audio software should be in there somewhere (it is on this list, but it's a bit thin. I would have added "editing software" to the list).
Check it out here: http://thedawstudio.com/Gear/Categories.html