There is a large variety of SEO software being offered and it is often confusing and difficult to locate which of these are helpful and which are useless. I suggest you look at the various SEO forums because it is where SEO consultants offer various tips and these include the software tools that they have found to be useful.
Some of these SEO tools are: the Doorway Generator from Asura Software; the SEO Analyzer 1.1; a tool that can be found at www.backlinkwatch.com that is useful for evaluating the anchor text link; the BLVD Status utility for monitoring keyword positions; SEO Elite Software; the SEODigger tool; and the LinkAssistant SEO Tool.
Doorway Generator from Asura Software has several features but its primary use is to generate doorways based on the templates that your provide. It can also be applied for generating a robots.txt file, a site map in either XML or HTML formats, and pages that have a certain number of keywords for each page. It can also handle the uploading of the doorways through FTP and it provides for the insertion of links in the text. It is also capable of handling five kinds of text generation and it can take care of inserting links that lead to other sites.
The SEO Analyzer 1.1 from code.google.com/p/seoanalyzer is primarily for examining the links and the page rank. Some of its features are: the ability to provide the page rang of a particular URL in Google; the extraction of the backlinks to the said URL; the page rank in Google of the backlinking sites; the capability to obtain the href tag employed by these backlinking sites; and the ranking of the input site in Yahoo and Google for certain keywords.
The BLVD Status tool is available for free and it has several helpful features for SEO purposes. These include the ability to: monitor in real-time the search referrals; look at the various search referrals for a particular web page; watch the conversions made for every search term; and provide extensive statistics on the particular search term that you want to study.
The SEO Elite software from Brad Callen claims to be able to place your web page at the top of the search results as a result of Callen's experience of having a site that is listed as number one when the searcher is looking for SEO software. Callen claims that you will able to know why a particular website is at the top slot in Google for a particular keyword. The tool has link building capabilities that would permit you to have thousands of other sites linking back to your own site. It will also show you a table and a chart that reveals how your site is performing in Google, MSN, AltaVista, Yahoo, and AllTheWeb.