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.

Dominik Schilling

required

This plugin helps you to declutter your WordPress admin by removing all Jetpack related notices that promote services like the backup services VaultPress, WordPress Apps or Blaze.

Jetpack Without Promotions

WordPress dashboard is a stage for abusive use of screen estate. The fact that Jetpack, a plugin by the company that confuses itself with WordPress, is leading the way in this abusive use is just wrong, a shame really, and setting the wrong example for all plugin and theme authors.

WordPress urgently needs a way to put this nags where they belong: the plugin/theme specific settings page or some kind of notification center.

Thank you Required for helping to clean up. It is not a definitive solution but it is a welcome panacea.

The plugin that should not be

Removes all admin notices for promotions added by Jetpack.

Legacy Jetpack Custom CSS Editor vs Jetpack Without Promotions