lelandf

Themetry

Contrary to popular belief, <a href="https://wordpress.org/plugins/jetpack/" rel="ugc">Jetpack</a> does not require you to connect your website to WordPress.com before you can use it at all.
Several Jetpack modules are self-contained and do not require a WordPress.com connection to function:
<ul>
<li>Asset CDN</li>
<li>Beautiful Math</li>
<li>Carousel</li>
<li>Contact Form</li>
<li>Copy Post</li>
<li>Custom CSS</li>
<li>Custom content types</li>
<li>Extra Sidebar Widgets</li>
<li>Gravatar Hovercards</li>
<li>Infinite Scroll</li>
<li>Lazy Images</li>
<li>Markdown</li>
<li>Sharing</li>
<li>Shortcode Embeds</li>
<li>Site verification</li>
<li>Sitemaps</li>
<li>Tiled Galleries*</li>
<li>Widget Visibility</li>
</ul>
The Development Mode for Jetpack plugin enables (wait for it…) <a href="https://jetpack.com/support/development-mode/" rel="nofollow ugc">Jetpack Development Mode</a>, which does two things:
<ul>
<li>Eliminates “nags” to connect a Jetpack-enabled site to WordPress.com.</li>
<li>Allows usage of modules that do not require a WordPress.com connection.</li>
</ul>
It also means you can stop using individual Jetpack modules that have been forked out into standalone plugins by random people. These plugins tend to be unsupported and out of step with the latest version of the official Jetpack equivalent.
Please note that this plugin requires Jetpack to be activated alongside it to be of any use, and will not help with the following modules that do require a WordPress.com connection:
<ul>
<li>Ads</li>
<li>Backups and Scanning</li>
<li>Comment Likes</li>
<li>Comments</li>
<li>Enhanced Distribution</li>
<li>Google Analytics</li>
<li>Image CDN</li>
<li>JSON API</li>
<li>Likes</li>
<li>Monitor</li>
<li>Notifications</li>
<li>Post by email</li>
<li>Protect</li>
<li>Publicize</li>
<li>Related posts</li>
<li>SEO Tools</li>
<li>Search</li>
<li>Secure Sign On</li>
<li>Site Stats</li>
<li>Subscriptions</li>
<li>VideoPress</li>
<li>WP.me Shortlinks</li>
<li>WooCommerce Analytics</li>
<li>WordPress.com Toolbar</li>
</ul>
Lists of Jetpack modules in this plugin description should not be considered comprehensive or authoritative, and may change at any time.
<ul>
<li>According to the previously linked documentation page for Jetpack Development mode:</li>
</ul>
<blockquote>
Tiled Galleries requires the WordPress.com Photon CDN; however, in Development Mode, Jetpack provides a fallback so developers can have a similar experience during development and testing.
</blockquote>
Other modules may also have “reduced functionality” but retain “a good-faith representation of the feature.”

Development Mode for Jetpack

This plugin enables Jetpack Development Mode, which allows usage of certain Jetpack modules without connecting to WordPress.com.

bozdoz

<a href="https://wordpress.org/plugins/jetpack/" rel="ugc">Jetpack</a> makes it easy to add contact forms to your WordPress site, but you may want a simple way to add a <a href="https://www.google.com/recaptcha/" rel="nofollow ugc">Google reCAPTCHA</a> to prevent spam. This plugin will manipulate the Jetpack <code>[contact-form]</code> shortcode to prepend the Google script, add a button, and parse the response.
This plugin allows both reCAPTCHA v2 and invisible reCAPTCHA (see screenshots and choose whatever works for you!).
Shoot me a question about it on Twitter: <a href="https://www.twitter.com/bozdoz/" rel="nofollow ugc">@bozdoz</a>.
This plugin is open source on <a href="https://github.com/bozdoz/wp-plugin-recaptcha-jetpack" rel="nofollow ugc">GitHub</a>!

reCAPTCHA Jetpack

A simple plugin that adds a Google reCAPTCHA to the Jetpack contact form. Requires the Jetpack plugin.

Development Mode for Jetpack vs reCAPTCHA Jetpack