Links to your site are the most important factor in search engine rankings. Once you have your on page SEO nailed down, it is time to start building backlinks. Not all links are same. One link with proper anchor text from a page of similar content on a high pagerank authority site is worth more than many random, non anchor text links on unrelated sites with little or no pagerank. Fortunately there are some powerful link building tools to help you build quality incoming links to your site.
Link Building Tools
Free software finds link partners, automates the process of getting and managing links. Includes many features to ensure you site remains SEO friendly
Find authority sites (hubs) that link to multiple sites for a given search term to identify potential sites to try to get a link from
Free tool provides links to many custom Google searches for the keyword(s) you enter. A great way to find potential links to your site, research the competition or find content to write about
Link Acquisition Assistant
Free tool uses information about your company, brand and competition and returns 121 link acquisition queries you can use in search engines to find potential link targets
Bulk Backlink Checker
Free tool quickly checks backlink and referring domains counts for multiple domains
Free tool analyzes backlinks to a domain. Flexible format is sortable and searchable. Shows no-follow links
Free FireFox plugin that shows Google PageRank, # of back links for the domain and the page, whois information, Google’s cache date for each page you visit. Similar to the SEOBook Toolbar.
Free FireFox plugin that improves on Yahoo Site Explorer link data by attempting to filter out weak links and showing anchor text information.
Free software automates finding and posting comments
Search over 2,300 discussion forums for topics related to a link you would like to have
Free online Class C IP checker. Links from the same C block IP address may not carry as much weight as links from different C block IP addresses