Ninja Rank not only checks keyword rankings but also manages SEO project efficiency
With Ninja Rank you can easily manage your SEO projects with Folder Sorting. It's easy to follow keyword fluctuation to make it easier to manage thousands of keywords
Google Analytics is my favorite SEO tool which is used to track the visitors to my site. Next I use Google webmaster tool to find the backlinks. Other than these I use opensiteexplorer.org, rank checker etc.