WordPress plugins under the GPL (General Public License) provide a wide range of functionalities for WordPress sites, from SEO tools and form builders to security enhancements and eCommerce solutions. These plugins are free to use, modify, and distribute, giving users flexibility in customizing their sites. While many plugins are available under the GPL, some third-party providers offer them without official support or updates, and users may need to rely on community forums or other resources for troubleshooting and assistance. Despite this, GPL plugins offer an affordable and open-source alternative for WordPress website owners.