Jetpack is a WordPress plugin that supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com.

• Appearance

Custom CSS Customize your site’s CSS without modifying your theme.

Extra Sidebar Widgets Add images, Twitter streams, and your site’s RSS links to your sidebar.

Gravatar Hovercards Enable pop-up business cards over commenters’ Gravatars. Infinite Scroll Add support for infinite scroll to your theme.

Mobile Theme Optimize your site with a mobile-friendly theme for tablets and phones.

Photon Accelerate your site by loading images from the WordPress.com CDN.

Shortcode Embeds Embed content from YouTube, Vimeo, SlideShare, and more, no coding necessary.

Widget Visibility Specify which widgets appear on which pages of your site.

• Developers

Jetpack Single Sign On Allow your users to log in using their WordPress.com accounts.

JSON API Allow applications to securely access your content through the cloud.

Monitor Receive notifications from Jetpack if your site goes offline — and when it it returns.

Omnisearch Search your entire database from a single field in your Dashboard.

• Other

Contact Form Insert a contact form anywhere on your site.

Monitor Receive notifications from Jetpack if your site goes offline — and when it it returns.

Notifications Receive notification of site activity via the admin toolbar and your Apple device.

Related Posts Display links to your related content under posts and pages. Site Verification Tools Verify your site or domain with Google Webmaster Tools, Pinterest, and others.

VaultPressPaid

Protect your site with automatic backups and security scans. (Subscription required.) WordPress.com Stats Monitor your stats with clear, concise reports and no additional load on your server.