If you're a fan of the abstract and grungy vector-based wallpapers floating around, X3Studios is a free tool for creating abstract wallpaper without needing a copy of Illustrator and a pile of stock images.
X3Studio sets up a palette, element selection guide and workspace right in your browser. You can select from background textures, dozens of abstract and grunge elements, and text you want to add to your background. The sliders on the right-hand side of the screen help you adjust the colour, saturation and brightness of the elements you have selected and all elements are easily rotated and transformed in size.
Many of the navigation techniques like shifting elements forward and backward, and navigating around the image using the navigator pane will be familiar to users of more formal image-editing software like Photoshop and GIMP — the interface is just radically simplified. You can download your wallpaper in sizes ranging from 1024x768 up to 1600x1200.
If you're not inclined to make your own but like the style, you can browse the gallery of work saved by other visitors. You'll find over 800 wallpapers in the visitor gallery all available for download. The wallpaper creation tool at X3Studios is free and requires no registration for use. Have another favourite online tool for generating cool wallpaper? Let's hear about it in the comments.