Jetpack simplifies managing WordPress sites by giving you visitor stats, security services, speeding up images, and helping you get more traffic. Jetpack is a free plugin.Traffic Growth & Insights
Jetpack tells you how many visits your site gets and helps you get more traffic with tools like Related Posts, Publicize, Enhanced Distribution, and Sharing.Security
Jetpack protects your site against brute force attacks and unauthorised logins. We also monitor your site for downtime and keep your plugins updated.Image Performance
Jetpack automatically optimizes and speeds up images using the global WordPress.com content delivery network. This saves you hosting costs by reducing bandwidth.Centralized Management
With Jetpack comes a centralized dashboard on WordPress.com. Manage plugins and menus, publish posts, and view enhanced site stats for all of your sites.A few more things that our users love
Jetpack includes other features that help you customize your site including Custom CSS, Contact Forms, Galleries and Carousels, Notifications and Subscriptions, Configurable Widgets, and many more.Dedicated Support
We have an entire team of happiness engineers ready to help you. Ask your questions in the support forum, or contact us directly.Contributing to Jetpack
Jetpack is open-source and we actively encourage community contributions: whether it's a compliment, bug report, code, or an idea we welcome it with open arms! Learn about contributing or consider joining our beta program.Is Jetpack free? Yes! The core features of Jetpack are and always will be free. Jetpack also integrates with paid services like Akismet (anti-spam), VaultPress (backups), and VideoPress (video hosting) but these are not required for Jetpack to function. Why do I need a WordPress.com account? Many of our core features (like Photon, Stats, and Protect) make use of the WordPress.com cloud. For this to happen Jetpack requires a (free) WordPress.com account. If you don't have one already you can easily create one during Jetpack's connection process. I already have a WordPress account, but it's not working. What's going on? A WordPress.com account is different to the one you use to log into your self-hosted WordPress. If you can log into https://wordpress.com then you already have a WordPress.com account. If you can't, you can easily create one during Jetpack's connection process. How do I view my stats? Once you've installed Jetpack your stats will be available via "Site Stats" which appears in the Jetpack menu (under your Dashboard menu within WordPress). How do I contribute to Jetpack? There are opportunities for developers at all levels to contribute. Learn more about contributing to Jetpack or consider joining our beta program.;
Here is the Jetpack by WordPress.com wordpress plugin download link you can download and install to your Wordpress blog
Extras for WordPress Jetpack. Tested up to Jetpack 3.4.1
Jetpack Prototype is an experiment in making it easy to...
A Jetpack version of Restartless Restart.
Save anything you like from the web into your Flipboard.
Powerful tool for analysing your Google+. You get insights about +1's, reshares, number of comments...
Automatically save the text. Shift + Enter post. for Google Plus™.
The "+Clip it button" is a tool to clip several images with description from web pages to the...
All in one custom set for Google Plus™