Yes, a Chrome extension that adds some SEO and design/development features that will make your life a little easier.
Developer website: http://chrispederick.com/work/web-developer/
Best Features for SEO: The extension is pretty nice for some SEO quick glance analysis. Some of these best features include, Disable CSS, Display Alt Tags, Display Inline Tags and View Meta Tag Information options.
I demonstrate these features in Part 1 of 2, below:
Feedback: How do you use the tool? Is there a better tool?