CSSFly lets you edit websites live in your web browser. It’s really a handy tool to edit websites directly without any annoying CSS editor or FTP login. CSSFly caches the HTML code and the CSS stylesheet of your demanded website and opens a frameset with two frames. You get your choice of how and where the frames open such as the markup on the top, bottom, left or right. The one frame contains the code data and makes it editable using a custom HTML-textarea. The other frame agitates as the display container for the changed website. Within every change in the HTML or CSS code, the display-container will be refreshed.

The bookmarklet at toolbar is also available for you quickly editing the current website displayed in your browser. This awesome tool is designed for web designers and developers. Use it for developing, testing or checking your projects or just take a look your favorite websites. Besides, it’s completely free to use and no any registration is needed.
http://www.cssfly.net