Source: MarketingTerms.com

Barter - to exchange goods or services directly without the use of money.

Banner Exchange - network where participating sites display banner ads in exchange for credits which are converted (using a predetermined exchange rate) into ads to be displayed on other sites.

Button Eexchange - network where participating sites display button ads in exchange for credits which are converted (using a predetermined exchange rate) into ads to be displayed on other sites.

Text Link Exchange - network where participating sites display text ads in exchange for credits which are converted (using a predetermined exchange rate) into ads to be displayed on other sites.

Web Ring - a means for navigating a group of related sites primarily by going forward and backward.

Website Award - an award given from one Web site to another Web site.