5. JuiceJuice inlines CSS stylesheets into your HTML source.
9. CamptixMoved to https://github.com/WordPress/wordcamp.org/
10. Expect.jsMinimalistic BDD-style assertions for Node.JS and the browser.
11. Newspack PluginAn advanced open-source publishing and revenue-generating platform for news organizations.
13. Custom MetadataA WordPress plugin that provides an easy way to add custom fields to your object types (post, pages, custom post types, users)
16. DocumatticWordPress presentations and resources shared by WordPress.com VIP
21. Vip ScannerDeprecated: Scan all sorts of themes and files and things! Use PHPCS and the VIP coding standards instead
26. sHi. I'm a starter theme called _s, or underscores, if you like. I'm a theme meant for hacking so don't use me as a Parent Theme. Instead try turning me into the next, most awesome, WordPress theme out there. That's what I'm here for.
27. Media ExplorerWith Media Explorer, you can now search for tweets and videos on Twitter and YouTube directly from the Add Media screen in WordPress.
28. Regenerate ThumbnailsWordPress plugin for regenerating thumbnails of uploaded images. Over 1 million active users and counting.
32. Es BackboneElasticSearch Backbone library for quickly building Faceted Search front ends.
33. Nginx Http ConcatWordPress plugin to perform CSS and Javascript concatenation of individual script files into one resource request.
35. Genericons NeueGenericons Neue are generic looking icons, suitable for a blog or simple website
37. KueKue is a priority job queue backed by redis, built for node.js.
39. PreforkPHP class for pre-loading heavy PHP apps before serving requests
42. MusicthemeA theme for bands and musicians that uses an experimental Gutenberg layout.
43. JetpackSecurity, performance, marketing, and design tools — Jetpack is made by the WordPress experts to make WP sites safer and faster, and help you grow your traffic.
44. ZoninatorCuration made easy! Create "zones" then add and order your content straight from the WordPress Dashboard.
46. WordblessWorDBless allows you to use WordPress core functions in your PHPUnit tests without having to set up a database and the whole WordPress environment
47. Lazy LoadLazy load images on your WordPress site to improve page load times and server bandwidth.
48. Cron ControlA fresh take on running WordPress's cron system, allowing parallel processing