Unit test your rewrite rules from the WordPress Admin.
Checks if the WordPress HTTP API is able to be used.
Manage and utilize the new Myna API from inside WordPress and get instant web content optimization!
Gives you the option to define which plugins must be active for a particular environment only.
Allows you to add placeholder content quickly and easily to your site.
Cross browser testing for WordPress. The Browsertest plugin allows you to open the current page in BrowserStack directly from the admin bar.
Dummy payment gateway for developers. Simulates IPN. Always marks Order as paid.
Lets you easily beta test plugins by notifying you of beta versions. Also lets you upgrade to beta versions from within WordPress.
Visually indicate the current server tier (dev, staging, production, etc.)
Split Testing in WordPress with unique logics from Steve Hanov's idea.
Theme Mentor is a cousin of the Theme-Check plugin getting deeper into the code analysis.
Preflightcheck runs various php test scripts to avoid errors when developing and deploying. Preflightcheck is easily extensible.
Framework required for all Pure Web Brilliant plug-ins, themes and CMS features.
Removes crazy, draconian, and released untested filters that break websites and cause issues for those whose language isn't American English. If
This plugin integrates Google Website Optimizer with WordPress.
A/B testing, the WordPress way.
Gives WordPress developers an easy way to test their functions and code in a live WordPress environment.
Processes Xdebug cachegrind files for viewing in WordPress.
WP Theme plugin allow you to preview a theme without activating it from admin panel.
Allows you test how a theme looks on your site without activating it.
Adds the revision and path of your Subversion working copy to the admin footer.