Free Add-ons
Lockout
Conditional lockout and notifications.
Select User Roles
Apply customize for selected user roles on My WP.
Add Site Auto
Automatically add multi-sites to a network.
Announce
Announce admin dashboard for all users.
WPAUC Importer
Import customize settings from WP Admin UI Customize to My WP Customize.
Thirdparty Add-ons
Advanced Custom Fields
Disable Fields Customize.
WPML
All Posts column header.
WPS Hide Login
Custom login page customize.
Premium Add-ons
Share Customize Multisite
My WP customize share on multisite.
User Role Based
Allow setting My WP for user role based.