WordPress.org API's is a set of API's on WordPress.org web site.
Secret key generator for wp-config.php.
Stats about the systems websites are running WordPress on.
WordPress Version Checker.
Details about the various individuals who contribute to the WordPress code base. Used in Credits Screen.
Available translation languages.
Note: Some docs on this api can be found here: http://dd32.id.au/projects/wordpressorg-plugin-information-api-docs/
Example: Basic Example of getting total download count of a plugin - http://wp.tutsplus.com/tutorials/plugins/communicating-with-the-wordpress-org-plugin-api/
List of popular import plugins in the WordPress Plugin Directory used by Tools → Import Screen.
Returns a JSON encoded array of file MD5 checksums for a given WordPress release / locale. Although english is the default, it's suggested to pass it for 100% compatibility with core.
Used by the theme and plugin editor to get a reference to documentation generated with phpDocumentor.