Sync Edit - Layer Synchronize Kit

Works with Adobe Photoshop CC 2018 and newer
Sync Edit makes it possible to edit just one layer and synchronize the changes to many other layers. Just work on one layer, you don't have to select the other ones or copy-paste any settings. All the changes get updated instantly and you can control which events to synchronize.
Trial Version:
There's also a free trial version, where you can synchronize only two layers simultaneously: 
https://henke.design/item/sync-edit-trial-version
Features:

• Edit Many Layers at Once
• Instant Change Updates
• Works Across Documents
• Works with any Layer Event (Events can be added, too)
• Enable / Disable Events
• Convenient Import Methods (all groups or by label color)
• Easy-to-use Interface
• 100% Precise Synchronization (also complex transformations)

Examples for what you can synchronize between multiple layers:

• Transform
• Set Layer Styles
• Apply Filters
• Change Blendmodes / Opacity Settings
• Color / Light Adjustments
• Delete Pixels
• Change Text Properties (font, color, size, etc)
• Rasterize / Convert to Smart Object
• Change Label Colors
• and more... (anything you can do with a layer)

Please note: For installation it's recommended to use one of the 3rd-party installers mentioned in the instructions.
Alternatively, you can also manually unzip the .zxp contents and move them to "C:Program Files (x86)Common FilesAdobeCEPextensions".