What are some alternatives?
When comparing CSS: The Missing Manual and CSS Scan, you can also consider the following products
CSStyle - Modern approach for crafting beautiful stylesheets.
Hoverify - A chrome extension that makes it super easy to inspect elements. Hover over any element to inspect styles and HTML attributes, live edit CSS, HTML or content, pick colors and much more.
MVP.css - Minimalist stylesheet for HTML elements
CSS Scan Pro - The easiest way to get and edit the CSS of any website, live