Linkage: Linkage is a search engine calculator which counts the inbound links of a website.

Link Farm: All links are free. Link Farm is allows that anyone can add a link.

Link Popularity: A measure of the quality and quantity of sites that link to your website

LinkRot: Linkrot reference to when url’s are broken, removed, redirect to new locations and url’s goes 404.

Logger: Logger tracks all the works that are done by a web page.

LookSmart: Looksmart is a web directory. Looksmart is one of the largest web directories.Lycos: Lycos is World Wide Web search engine and an Internet web portal. Lycos started as a search engine research project in 1994.