WordPress is among the more popular blogging software applications because is is free and open source. WordPress uses templates, generally known as themes, that contain the coding creating a graphical interface with an underlying design. The popularity of free WordPress templates as a tag stems from those templates or themes that are available at no cost.
There are both free and commercial WordPress templates available. There has been some dispute and discussion among WordPress users regarding "free" templates that are actually sponsored. Sponsored templates contain bundled commercial ads and links, generally one or more text-link ads that usually appear at the bottom of each blog page. The WordPress theme directory no longer includes templates containing hidden, paid or sponsored links.