WordPress.org

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

By: Matt Mullenweg، Ryan Boren، Andy Skelton، Michael Adams (mdawaffe) و others.

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

By: Donncha O Caoimh، Automattic و Brandon Kraft.

bbPress is forum software, made the WordPress way.

By: Matt Mullenweg، John James Jacoby، Jennifer M. Dodd و Stephen Edgar.

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

By: Automattic، Adam Heckler، Andrew Duthie، Alex Kirk، allendav، alternatekev و others.

BuddyPress helps you build any type of community website using WordPress, with member profiles, activity streams, user groups, messaging, and more.

By: John James Jacoby، Paul Gibbs، Boone Gorges، r-a-y، imath، @mercime و others.

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

By: Samuel Wood (Otto) و Simon Prosser.