WordPress.org

BuddyPress helps you run any kind of social network on your WordPress, with member profiles, activity streams, user groups, messaging, and more.

Przez: John James Jacoby, Paul Gibbs, Boone Gorges, r-a-y, imath, @mercime i inni.

Increase your traffic, view your stats, speed up your site, and protect yourself from hackers with Jetpack.

Przez: Automattic, Adam Heckler, Andrew Duthie, Alex Kirk, allendav, alternatekev i inni.

bbPress is forum software, made the WordPress way.

Przez: Matt Mullenweg, John James Jacoby, Jennifer M. Dodd i Stephen Edgar.

Akismet checks your comments against the Akismet Web service to see if they look like spam or not.

Przez: Matt Mullenweg, Ryan Boren, Andy Skelton, Michael Adams (mdawaffe) i inni.

A very fast caching engine for WordPress that produces static html files.

Przez: Donncha O Caoimh, Automattic i Brandon Kraft.

A simple and easy way to test your theme for all the latest WordPress standards and practices. A great theme development tool!

Przez: Samuel Wood (Otto) i Simon Prosser.