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