SEO Tools
Here are a few SEO tools on the web that can help you in your search engine optimization (SEO) efforts.
SEO Tools - Search Engine Optimization Tools
Google External Keyword Tool
First and foremost, the single most important free search engine optimization tool that anyone interested in a SEO should know about is the Google External Keyword Tool.
As of the time of this writing, it is a free and you do not even need a Google account to use it. Let's hope that Google keeps it this way.
The tool will show you the number of searches for various key phrases and its level of competition. It will be able to give you a side-by-side comparison of the various key phrases for you to choose which phrase to optimize for. It can also be used to find heavily searched keyword phrases that have low level of competition.
The statistic and data are based upon the number of searches done through the Google search engine. And since Google has the largest search engine market share of over 60% of all the searches in the world, it has a lot of data. If you are looking at free tools, then this should be the primary free tool that you should rely on for your SEO activities.
SocialMonkee Firefox Plugin
This plugin can be used to build Backlinks. Here is a video demo displaying how you can do this everyday.
Download the SocialMonkee Firefox Addon
Wordtracker.com
Wordtracker.com has a series of SEO tools including Wordtracker Keywords, Wordtracker Link Builder, and Wordtracker Strategizer. Although there is a free trial, the tools are not free and require signup.
The Wordtracker keyword tool is similar to the Google External Keyword Tool. It focuses on obtaining long-tail keywords and related keywords for you. It shows the competition of the key words. And it also shows the KEI (Keyword Effectiveness Index) of the keyword, giving you a single number to gauge how good a particular keyword phrase is.
Wordtracker Link Builder tool helps you find inbound links. Getting inbound links from quality and authoritative sites is not easy, but it is one of the most important strategies of any SEO campaign. It is almost like finding a needle in a haystack. The tool finds relevant link prospects and evaluates each one for you so that you can cherry-picks the links you want to go and obtain. One of the main features is that it shows you where your competitors are getting their links from.
SEOQuake SEO Extension
A great SEO plugin for Firefox aimed primarily to help with search engine optimization(SEO). This tool allows you to investigate many important SEO parameters of the internet for free. Download Link (Works on Firefox Only): SEOQuake SEO Extension
Nichebot.com
Like Wordtracker, Nichebot.com helps you discover long-tail keywords. It combines four different databases to do this, including Google data and Wordtracker data.
Nichebot is not a free tool. But nichebotclassic.com is a free "lite" version of that tool which allows up to 20 keyword searches per day. It does require a signup.
NicheWatch.com
NicheWatch is a free SEO tool. Type in a keyword and it will provide you with the top competition for that keyword. It will show the competitor's number of backlinks, page rank, the number of keyword occurrences, and more.
The tool even has a Firefox add-on extension.
SEO-Browser.com
SEO Browser is a fast, efficient, and comprehensive Text SEO analysis tool that helps you examine and understand the various parts of your web page.
Broken Link Checker
You can find broken links on all pages of your site with only one click using this Broken Link Checker
Free SEO Tools & Search Engine Optimization Software
These are just a few of the more well-known SEO tools. There is tons of other SEO Software (both free and paid) on the Internet. Some useful Resources include - SEOBook SEO Tools / SEOMoz SEO Tools.