If you need a light and FREE image editing software, Paint.NET is for you. Of course, it's not top-of-the-line like Photoshop but it's good enough for most Web Design uses. Don't be put-off by its ties with Microsoft since it was developed by students as a thesis (which was funded by MS). The interface has some photoshop feel too.
Download it
HERE.
BTW, you'll need .NET Framework 2.0 to make it run and it can be downloaded for free too.
