How to edit your .psd file for free without using Photoshop?

I found a great theme for my health blog but my only problem is how can I edit the psd files to change the banner when I don’t have a Photoshop. So I tried to look for free softwares that will let me edit the psd files in the absence of Photoshop.

Here are what I found as suggested by users:

1. GIMP or GIMPShop. Everybody knows that this is the highly recommended free alternative for Photoshop. However, I think it does not support layers in PSD.

2. Paint.NET with the PSD plugin. Paint.NET is a free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.

Isn’t it great that the web always has the answer? :)