Pixelmator is a great Photoshop replacement for people that don’t need all of the Photoshop features, or can’t afford to buy a $700 program. At only $59 it’s definitely a feasible replacement.
I’ve been using Pixelmator to create simple (and different) headers for web sites. Here is a way I’ve been playing with and has given me some interesting results.
Open a new file (most headers are 800 or more pixels wide). Go to Filter > Quartz Composer > Generator > Wall. Choose whatever colors seem appropriate for your website.
Next go to Filter > Tile > Affine Clamp and move it around until you’re happy with the look. Select a font and place your text. The font I chose was MutantE. Total time spent on your header ~ 2 minutes.
If interested read our full PixelMator review.

Alex