Posted by Andrew.
1. Firebug Lite
Developed by Firebug Team.
Firebug Lite is a tool for web developers, that allows you to edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.
2. Speed Tracer
Developed by Google.
Speed Tracer is a tool to help you identify and fix performance problems in your web applications. It visualizes metrics that are taken from low level instrumentation points inside of the browser and analyzes them as your application runs. Speed Tracer is available as a Chrome extension and works on all platforms where extensions are currently supported (Windows and Linux).
3. PageRank Status
Developed by ChromeFans.
PageRank Status is a Chrome SEO extension for webmaster. With this extension, you can view the Google PageRank and Alexa Rank of the current web page, quick access to Whois, Alexa, backlinks and indexed pages in a popup window.
4. Resolution Test
Developed by Ben Beckford.
Resolution Test changes the size of the browser window for developers to preview their websites in different screen resolutions. It includes a list of commonly used resolutions as well as a custom option for you to input your own.
5. W3C (x)HTML Validator
Developed by David Boissonnault.
W3C (x)HTML Validator displays one of 3 icons (valid, invalid, processing) in navigation bar related to validity of (x)HTML document currently shown.
6. SEO Site Tools
Developed by Carter Cole.
SEO Site Tools pulls PageRank, domain links and rank metrics, aggrigates social media reactions from Twitter, Facebook, Digg and SEO releated tags.
7. Domain Availability Checker
Developed by SEOHeap.com.
Domain Availability Checker checks the availability of a domain name. What's the point of going to another page when you can check it from your toolbar.
If you know more useful extensions for webmaster, please leave your comments! :)
Other resource
#1 w3cvalidation posted on April 28, 2010 06:12 PDT
Nice information, I really appreciate the way you presented.Thanks for sharing..
It is Very useful SEO tool.You can see all the impotent information just one click...
#3 Shaun posted on June 20, 2010 06:13 PDT
Do you have an extension to view the most recent cached version of a page?
Excellent SEO Tools for Chrome. Thanks for sharing
#5 Cell Phone Spy posted on November 06, 2010 15:24 PDT
Thanks for this info...SEO Site Tool is just what i needed!
Jeff
#6 jacky posted on December 06, 2010 16:48 PST
Nice information, I really appreciate the way you presented.Thanks for sharing..
#7 pelleting machine posted on April 20, 2011 01:19 PDT
You can see all the impotent information just one click...
#8 Arti Nama posted on December 08, 2011 00:16 PST
download first ah, it seems useful
#9 emilay posted on December 12, 2011 19:47 PST
for what could that Firebug to edit pages that have been so?
or just to monitor it?
#10 susu nzco posted on December 25, 2011 22:28 PST
2. Speed Tracer
This application is useful for improving web performance?
how to use it?
#11 nama bayi posted on December 26, 2011 00:01 PST
whether all of the software is very important? Please explain, because I was new in the world website
#12 sprei murah posted on January 12, 2012 23:25 PST
page rank is good for what?
What to see the rank of a website?
#13 Acai Berry posted on January 16, 2012 00:51 PST
software that I have just pagerank, thanks, I'll try to find it and download it
#14 pemanjang bulu mata posted on January 24, 2012 23:13 PST
function of the SEO site tools what?
whether it can be very helpful?
7 Chrome Extensions for webmasters and web developers