There are only two that I know of. AlliED and New Horizons Editor. Both are pretty easy to use, but AlliED can do more specific things, and also has a "jump to order" order, whereas New Horizons doesn't. AlliED lets you put in number values for WPs, but New Horizons prefers that you just click somewhere on the map. I think I like AlliED better, but you can try out both.
"Intensify forward firepower!!"