优秀的反向链接分析工具，能分析竞争对手反向链接各个因素；包括链接文字、链接页面PR、链接页面的外部链接、以及链接质量......总之一切非页面因素都能分析清楚,是SEO公司必备工具

The page your link is located on
The IP Address of the website linking to you or a competitor
Whether or not they're still linked back to your website
The Google (PageRank) of their links page
The Alexa Rank of your link partner's website
The page title of the webpage your link resides on
The anchor text surrounding your link
The total number of times a specified keyword appears within your anchor text
The percentage of websites that a specified anchor text exists within your anchor text.
The total number of outbound links on the webpage your link resides on
The total number of links on the the webpage your link resides on.
Allows you to do a "whois search" on the website your link resides on so you can easily call them up on the telephone if you wish.
The email address of the website your link resides on
The link popularity of the webpage your link resides on
Calculates the average Page Rank of all the websites pointing to your website
Calculates the number of PR0-10 websites linking to your website
Summarizes the number of links from each IP Address