Andy Hagans - Offers services to build permanent, relevant links. Includes link building articles. - http://www.andyhagans.com/
TextLinkPopularity - Buy or sell permanent text links. - http://www.textlinkpopularity.com
LinkedURL - Tool checks a site's Google PageRank, and reports how many links to that site are indexed in five major search engines. - http://www.linkedurl.com/
Link Hounds - Provides link building tools for backlink analysis, competitive analysis, and articles on link building. - http://www.linkhounds.com/
PageRank Checker - A tool to check the pagerank of any web site online and to display the web site's pagerank on its pages. - http://www.prchecker.info
PageRank Check - Online tool to check the PageRank of a website. Webmasters can place a button on their site that shows PageRank without using the Google Toolbar. - http://www.pagerank-check.org
Text Link Ads Inc. - Sells static HTML links to help increase traffic. - http://www.text-link-ads.com
Free Text Link Exchange - Partner program allowing one to buy, sell or exchange links for free. - http://www.freetextlinkexchange.com/
Link Popularity Service - Offers reciprocal and non reciprocal link popularity building services. - http://www.linkpopularityservice.com
Uptimebot.com - Offers online link popularity script and option for daily emails of link popularity on multiple domains. - http://www.uptimebot.com/
BuySellLinks.com - Allows buying links from other sites or selling links to other web site owners. - http://www.buyselllinks.com/
Text Link Brokers - Buy or sell text links for link popularity. - http://www.textlinkbrokers.com
Building Page Rank - Discusses google pagerank and honest ways of building it. - http://www.ipagerank.com
Boost Link Popularity - Human powered link popularity and link exchange programs for increasing website's search engine rankings. - http://www.boostlinkpopularity.com
Link Popularity Pro - Specializes in building link popularity on Google. - http://www.linkpopularitypro.com
TXTlinks.com - Offers guaranteed reciprocal link building services to increase link popularity score, targeted visitors and overall sales. - http://www.txtlinks.com
Website Publisher: All About Link Popularity and PageRank - Explains what link popularity and PageRank are, how to get incoming links, and how to optimize internal link structure. - http://www.websitepublisher.net/article/link_popularity/
Linking Matters - Contains free reports that provide detailed guidelines, worksheets and resources for running an effective linking strategy to gain both traffic and quality link popularity. - http://www.linkingmatters.com/
Marketleap Link Popularity - Compare link popularity for up to four URLs. Provides a benchmarking report to show where the submitted URL stands in comparies to competitors and other major online players. - http://www.marketleap.com/publinkpop/
Web Site Popularity - Comparison of link popularity tools with information of services provided. Reports which search engines are used, the maximum numbers of URLs and if reports are available by e-mail. - http://www.cryer.co.uk/resources/popularity.htm
LinkPopularity.com - Generates a customized report detailing a web site's link popularity. - http://www.linkpopularity.com/
LinkStrategy - Reciprocal link management and strategy services. - http://www.linkstrategy.com
Link Popularity Tools - Offers link popularity tools, including a free downloadable link popularity checker, and articles explaining link popularity and how to increase it. - http://www.link-popularity-tools.com/
Abounding Links - Offers services in increase link popularity to promote websites. - http://www.aboundinglinks.com/
LinkageXpress - Hand-tailored link popularity service which will announce site, get site linked within niche market, and generate targeted link partners. - http://www.linkagexpress.com
Linking101.com - Provides information, links, and resources to assist webmasters in understanding and creating inbound links to their site as a means of promoting it. - http://www.linking101.com
Link Popularity Linktree.info - A website promotion tool that helps with targeted link popularity campaigns. - http://www.linktree.info
LinksManager.com - Links management application service which automates links page management. It also promotes your website through a reciprocal link exchange which increases link popularity and web site traffic. - http://linksmanager.com