I have been asked recently about website design software. I use CoffeeCup Visual Site Designer. Here is the link:

This is simple software to learn to use. All upgrades in the future are free. You can add or subtract other modules that you need like Shopping Cart Creator. I only have Visual Site Designer and have made a couple websites using this software. Here is the link to the other modules

I understand that there are more powerful website programs available. I plan to buy and learn Dreamweaver sometime but for now CoffeeCup works. You can try 226STS for a 20% discount. If it doesn't work Google CoffeeCup Discount and other codes will pop up.