Sales copy writing STYLE...

Usually something like Adobe Illustrator is used to create graphic elements on sales pages, but every designer has his own weapon of choice..

There is no secret software that everyone is using and not letting you in on it

you can design it with by using Photoshop or dream viewer these are the best

Try these:

Best WSO Graphics Package No Photoshop needed

There was also a WSO called WSO Lister which is an online software that creates your WSO Sales Page for you with graphic effects and everything.

Alternatively you can get someone with design experience to design your WSO Sales page for you by looking in the Warrior Products and Services: Warriors for Hire section or Wanted: Warriors looking to Hire you.

Disclaimer: I am not an affiliate for any of these.

Adobe illustrator is mostly used for graphic work hence if you want to design a perfect wso then you should not avoid it..

Designers use Adobe Photoshop or Illustrator, but they are expensive. Some FREE alternatives are:
1.- GIMP
GIMP stands for “GNU image manipulation program”, and it is one of the oldest and most well known alternatives to Photoshop in existence.

2.-Krita
Krita has been lauded for ease of use and won the Akademy Award for Best Application in 2006.

3. Paint.NET
Paint.NET has grown out of a simple replacement for the well known MSPaint into a fully featured open source image editor with a wide support base. You’ll need Windows to run Paint.NET.

4.- ChocoFlop
ChocoFlop is a design application designed exclusively for Mac, optimized for Mac architecture. It’s quick and fairly well featured. This program won’t always be free, but until a stable version is released (it’s currently in beta) they are allowing free use.

5.- Pixia
Pixia was originally designed in Japanese but English versions now exist for this rich editor. Although the original focus was on anime/manga, it is a very capable editor in general.

alfid is right. I use GIMP, it's very easy and powerful, and best of all it's FREE.