So you're working on a web page and you're making some adjustments to the CSS files, and you want to see what those changes look like.  You click reload, but it reloads the whole page, undoing all of the changes that have been applied to the DOM via javascript.  There's got to be a way just to update the CSS without refreshing the whole page, right right?

CSS Reloader is a [Chrome] browser extension that allows you to reload CSS without reloading the page itself.

From Chrome Web Store - CSS Reloader.

There's a similar tool for reloading CSS in Firefox, too!

I was trying to put together a nice background gradient in CSS that uses alpha values in the color to indicate transparency. There are a handful of tools out there that do it, but The Ultimate CSS Gradient Editor  has everything I needed:

The Ultimate CSS Gradient Editor was created by Alex Sirota (iosart). If you like this tool, check out ColorZilla for more advanced tools such as eyedroppers, color pickers, palette editors and website analyzers.

From Ultimate CSS Gradient Generator

Color pickers, sliders for positioning colors within the gradient, presets, a preview and a simple copy to paste output. All that, and it supports transparent colors in the gradient. Very nice.