Chrome extensions for web designers and website developers:

Firebug Lite – website debugging and website testing tool.

Web Developer – Web Developer toolbar.

Resolution Test – testing web pages in different screen resolutions.

Pendule – web developer tools.

Image Cropper – crops images in any website on the fly.

Lorem Ipsum Generator – creates random dummy text, so useful for website designers to show a draft of layout for website.

IE Tab (for Windows) – display web pages using IE, so you can see how your website will look in Internet Explorer.

jQuery Shell – something for web developers, it allows jQuery command extension in current page context.

Color Picker – Quickly get the Hex and RGB values of any color! Also adjust Hue, Saturation, and Balance.

WebEdit – so cool stuff for web deisgners, it makes any webpage editable, but changes are not permanent.

Webpage Screenshot – easy solution to save JPG screenshots of any webpage. This extension captures the whole page.

SEO Site Tools – On-Page / External metrics, Social Media info, Metrics / numbering on Yahoo, Bing, Google SERPs.Extends WMT, YSE and GA with metrics.

Eye Dropper – eye dropper, however sometimes it doesn’t work with some configurations of browser and operating system.

Source: Royal Deer Design research and resources from sixrevisions.com