Very likely Fuligo septica (article in link also mentions there is _nothing_ you can do about them - learn to enjoy these harmless beasties)
Here a couple of slime molds I have found in the same general area - Leocarpus fragilis capsules Fuligo septica
This photo of a slime mold on a lawn was posted recently by @anon125; I am copying it here, as we can use a few photos here. This might be Mucilago crustacea.