Josh Eaton

Make Jetpack’s Holiday Snow feature accessible by only showing it if user has opted-in by clicking a snowflake displayed on the page. Users can also disable the snow if they get tired of it by clicking the snowflake again. The snow is disabled by default, and the snow status is stored in a cookie so it will remain on or off until the user decides.
Requires Jetpack (obviously)
If you’re a user and interested in being able to block the Jetpack Holiday Snow from loading on any site you visit, check out my Chrome Extension: <a href="https://github.com/jjeaton/block-holiday-snow" rel="nofollow ugc">Block Holiday Snow</a>.

Jetpack Holiday Snow Opt-In

Make Jetpack's Holiday Snow feature accessible by only showing it if user has opted-in by clicking a snowflake displayed on the page.

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.

Jetpack Holiday Snow Opt-In vs reCAPTCHA Jetpack