Free online design tool BgPatterns gives you a full range of options to make your own tiled/repeating backgrounds, whether for your computer desktop or to fill in the background space on a blog or web site. The transparency, foreground/background colors, rotation of the patterns, and canvas texture are all up for tweaking, and there's a gallery of designs you can stroll through and vote on. In other words, it's reminiscent of the tiled background options from earlier versions of Windows, just a lot more appealing. BgBackgrounds is free to use and download images from; signing up lets you store your patterns online.
BgPatterns [via Demo Girl]