Wow, Amazing looking Web 2.0 Covers. These were designed so that you don't have to have Photoshop though you will need something that can open PSD files, like the free Gimp. There are 8 main templates and each comes with 55 different effects and 20 different shapes that you can customize just right. You can even make them look like they are really 3D. There are also 90 Web 2.0 layer styles. With this you can make your Covers without a designer.
PC and Mac.
Required is software that opens PSD files like Gimp. Recommended is Photoshop or Photoshop Elements.