I really like Google Sketchup for all kinds of design things. And it's free. You can't beat free. It doesn't have some of the landscaping-specific tools of the other programs, but it also doesn't have the price tag of the other programs.
I've also seen this suggested here: http://www.homedesignersoftware.com/landscape-deck/
thank you all!
Phil, I use MS Paint for our landscape design. You have to do it all yourself and it's not "real" looking, but it comes with all Windows programs. Here's a drawing I did for around our home...
Sorry, the photos are not loading for some reason this morning. I'll try and add it later.
Becky, thank you I will watch for your uploads.
You're welcome. I just added pictures of my current woodwork project and the pictures loaded so I'll see if it works now. Yay, it did, though it's rather small.
This might be a little easier to see... http://i187.photobucket.com/albums/x46/JustGotaBMe/HOME/Exterior/92a1e41a.png
go to Better Homes and Garden .com You will find a diy landscape app. and many landscape design already done and easy to duplicate ! Great site !