Hi there! Apologies in advance if this has already been submitted in a similar SEO thread - but I've just noticed this software and thought it may be of use. From what I can see, seems like a really decent tool for monitoring SEO - it's part of the Softaculous thing that my web host offers displaying a variety of different web tools.
The description is as below:
The address is: http://www.seopanel.inAn Award Winning and complete open source seo control panel for managing search engine optimization of your websites. Seo Panel is a seo tool kit includes latest hot seo tools to increase and track the performace of your websites. It is a free software released under GNU GENERAL PUBLIC LICENSE V2. Seo Panel selected as 1st Runner Up in 2011 Open Source Awards as Most Promising Open Source Project. The main feature of seo panel is its extendability by using seo plugins. Any one can easily develop and install required plugins for their seo panel.
As I said, this may (or may not) be useful for you, but thought I'd share either way! Enjoy