Here you can find my favorite free SEO software and SEO tool I use daily.

I use following free SEO software and services:

1. StatCounter or Google Analytics (Services)

These are the first and most important free tools I use to get an ideas:
-how many visitors do you have or had in the past
-where people are coming from
-what are recent search queries
-what are your popular (and unpopular) pages

2. SEO Quake – Free Firefox Plug-in (Software)

This is a good example of very useful and nice free SEO software. I have SEO Quake installed in my FireFox as a plugin. I use SEO Quake to check Google Page Rank, Alexa Rank and to measure a keyword density of my webistes as well as to research competitors in SERP.

3. Google Adwords Keyword Tool (Service)

This tool Google created to enspire you to use AdWords service. But it is priceless source of ideas how to optimize the ranking of your website.
This is a really good tool to find all the popular keywords and get idea of what people type in in the search line when they are looking for something

Link:
https://adwords.google.com/select/KeywordToolExternal

There is a whole science about how to use it. I am going to explain how I use it in the future keywords and page optimization sections.