brainstorming tools

I’m always looking for new ways to brainstorm. Occasionally when I’m strapped for ideas, I visit websites that start the wee gears spinning again. Here are a few I just thought of:

the visual thesaurus: Great tool to visualize interconnected associations of concepts
flickr: Fun to search different tags to see variations on themes, especially through the slideshow feature. This site has the potential to become fairly addictive, so beware!
css zengarden: Always inspiring how many different designs can come from the same html.
zefrank’s scribbler: Relaxing/stimulating to do a scribble which automatically develops over time.
wallpaper design zine: Design-o-rama with pics.

If you have any others that help you out of those creative blocks, feel free to share.