George Stephanis

This plugin re-adds a standalone editing page for Custom CSS 
in the WordPress Admin UI, for users that aren’t comfortable 
using the one in the Customizer.
Currently it only works with Jetpack and Jetpack’s added features, 
but shortly it will work without Jetpack as well, providing a 
more basic text editor without syntax highlighting.

Legacy Jetpack Custom CSS Editor

I was utterly dismayed to see the old Jetpack CSS editor disappear in favor of a little customizer box in WP 4.7. Thank you so much for restoring the legacy editor where we can actually see what we're working with, and where our designer can work with CSS without having to upload style.css every time they make a change. It's a vital part of our workflow and the little box in the customizer is completely inadequate.

many thanks for this lifesaver

This plugin re-adds the full page admin Custom CSS editor to Jetpack.

Jeremy Herve

Extends the Jetpack plugin and allows you to add sharing buttons anywhere inside your posts thanks to the [jpshare] shortcode
Important: for this plugin to work, you must activate <a href="https://wordpress.org/extend/plugins/jetpack/" rel="ugc">Jetpack</a> first, and activate the sharing module.
This plugin is a work in progress. You can report issues <a href="https://wordpress.org/support/plugin/jetpack-sharing-butttons-shortcode" rel="ugc">here</a>, or submit a pull request <a href="https://github.com/jeherve/jp-sd-shortcode" rel="nofollow ugc">on GitHub</a>.

Sharing buttons shortcode for Jetpack

Extends the Jetpack plugin and allows you to add sharing buttons anywhere inside your posts thanks to the [jpshare] shortcode

Legacy Jetpack Custom CSS Editor vs Sharing buttons shortcode for Jetpack