Esoterrific

The icon above was spawned by a debate with a co-worker about what symbolizes a fort. Since no icon yet existed at the Noun Project, I decided to submit it. The Noun project is an awesome resource of streamlined vector symbols. The site curators do a fantastic job of quality control. They smartly passed on my first submission, luckily I was already working on a more refined version. It will be interesting to see if the noun project implements an embed feature – ala @font-face.  Check it out - http://thenounproject.com/noun/fort/#icon-No1062.

Html 5 Ball Pool – addictive  - http://mrdoob.com/projects/chromeexperiments/ball_pool/

From 1941 -2011 – http://annyas.com/chevrolet-speedometer-design/

Web developer is a fantastic little chrome browser extension with a ton of features.  It builds upon firebug and web inspector adding more features and tools to analyze a web page.  The ruler function is helpful, outline elements, validation, and browser resizing for checking page viewablity (fyi viewability is an new word).
Link - http://chrispederick.com/work/web-developer/

Also check out these other useful extensions:
whatfont - tells you what information about fonts on screen with click
Ghostery - not really design or dev tool, but shows the tracking services on the page.