I Really Love to use Free SEO Tools. It makes your complex work very easy. Here is some of the most amazing SEO Tools..
For Keyword Research : http://www.keywordeye.com/
Suggest data from Google and others: http://ubersuggest.org/
Anchor Text Over Optimization Tool : https://www.removeem.com/ratios.php
Convert Word Documents to HTML Code : http://word2cleanhtml.com/
Duplicate Content Checking : http://www.copyscape.com/
For Broken Link Check : http://download.cnet.com/Xenu-s-Link-Sleuth/3000-10248_4-10020826.html
Robots.txt Generator : http://www.yellowpipe.com/yis/tools/robots.txt/
Wordstream for Keyword Research : http://www.wordstream.com/free-keyword-tools
For Keyword Research : http://www.keywordeye.com/
Suggest data from Google and others: http://ubersuggest.org/
Anchor Text Over Optimization Tool : https://www.removeem.com/ratios.php
Convert Word Documents to HTML Code : http://word2cleanhtml.com/
Duplicate Content Checking : http://www.copyscape.com/
For Broken Link Check : http://download.cnet.com/Xenu-s-Link-Sleuth/3000-10248_4-10020826.html
Robots.txt Generator : http://www.yellowpipe.com/yis/tools/robots.txt/
Wordstream for Keyword Research : http://www.wordstream.com/free-keyword-tools
