Welcome to the Guild weezdiggity! Well depending upon the style of map desired, Fractal Explorer 3 is a good realistic style land generator. Wilbur is also another free to download program that would be worth checking out. Beyond that I'm not really sure, not my area of knowledge. Someone else here might have other suggestions for you. However it may be worth your while just to try your hand at some of the tutorials here, you may be surprised at how quickly you are able to learn to digital map.