This is one of the very important tool in the industry. This tool helps you to check ” No Follow ” tag.

Keyword Forecasting Tool by MSN Adsence Tools has following features : Number of searched over the past year, A forecast of number of searches in the coming months, Keyword age distribution, Keyword gender distribution
Google “Supplemental Results” Identifier A supplemental result is just like a regular web result, except that it’s pulled from our supplemental index.
Page Strength The tool is designed to satisfy the curiosity of webmasters, surfers and web marketing professionals seeking a better metric to quickly assess a site/page’s relative importance and visibility.
Google Trends Google Trends allows a user to compare among two to five keywords with respect to how many times users have searched, and how many times such have appeared on news items, as keywords and topics.
Top Ten Analysis SEO Tool Top 10 Analysis SEO Tool: For a search phrase, finds the top 10 results (and your URL) in Google, and for each of those sites, finds Yahoo rank, MSN rank, number of pages indexed, backlinks (page/domain/.edu), alexa traffic rank, allinanchor rank, age of the domain (whois), age of the domain (wayback machine), a count of the search phrase on each page, and a link to find related pages in google.
Link Suggestion Tool Use this link popularity suggestion tool to find possible pages
from where you can get a link to your page .
Google Datacenters Popularity Checker Tool This free seotool will show how many links are pointed to your website on different Google datacenters .
The Neat-O-Backlink Tool This tool is to check your backlinks and the anchor text used in those backlinks.
Page Rank Decoder The PageRank Decoder allows you to visually see how Google factors PageRank based off of link structure. Be sure to view the Demo first.
Search Engine Decoder Search Engine Decoder.
SEO Links Extention A totally new and smart way to check SEO stats while you surf
Visual PageRank The Visual PageRank - Tool shows all links and there corresponding PageRanks.
Bulk Google Page Rank Checker Tool Bulk Google Page Rank Checker Too, check up to 25 link at one time.
Top Competitor Tool This tool shows the top domains for a particular keyword in Google, Yahoo, and MSN.
Live Page Rank Live Page Rank Update.
Alexaholic Alexaholic blends Alexa website traffic graphs with a lightweight ajax-enhanced interface to satisfy hard-core Alexa traffic chart junkies – aka Alexaholics.
Sandbox Detection Run this tool to determine if your site is in the sandbox
Google Analytics Google Analytics tells you everything you want to know about how your visitors found you and how they interact with your site. Focus your marketing resources on campaigns and initiatives that deliver ROI, and improve your site to convert more visitors.
Link Value This tool calculates the link value per month of a given website.
This value can be used for your decision you should purchase a link on that page.
Cloaking Detector This tool simulates the Googlebot (based on User-Agent) to detect cloaked content.
Pagerank Script for your website Page Rank Script of Google and Alexa Ranking for your website.,
Website Analyzer The Website Analyzer’s Keyword Density allow you to quickly determine the correct keyword density mix on the top scoring pages using spider technology similar to the search engines.
Google vs Yahoo Graph Graphic display of top 50 in Google & Yahoo linked.
Keyword Density Analyzer Enter URL, determines density of 1, 2, and 3 word phrases.
Multi DC PageRank Checker Check PR values across all Google datacenters.
Retrieve SERPs Google datacenter SERP checker.
Kontera Ads Preview

This tool allows you to preview Kontera Ads on your website.
Kontera is considered as one of the good alternatives to google adsense.
Page Strength The tool is designed to satisfy the curiosity of webmasters, surfers and web marketing professionals seeking a better metric to quickly assess a site/page’s relative importance and visibility.
IP Location Lookup This is not an SEO tool, but is very useful in determining the geographic location of an IP address using a bit of AJAX and Google Maps.
Keyword Difficulty Used to analyze the competitive landscape of a particular search term or phrase, this tool issues a percentage score and provides a detailed analysis of the top ranking sites at google and Yahoo.
Strongest Subpages Tool This tool will find 30 of the strongest subpages of the domain entered, and will show how many other sites are linking to those pages.
Deep Link Ratio Tool This tool was created to analyze how the deep link ratio of a site affects its rank in search engines. We can use this tool to compare the DLRs for the best ranking sites for a search phrase.
Speed Tester This tool shows the duration of a given website.
This value can be used for showing how long a website take to load and
if it is better to optimize the website or change a (slow) ISP.
Alexa backlink pagerank checker Google pagerank checker / Check Alexa Rank / Check Backlinks