Normalize Image Styles
Generate image styles based on aspect ratios.
Image Sizes
Automatic styles based on parent element width.
Image Style Generate
Define image styles to generate in a yaml file.
Library Attach
Attach libraries to content using a filter.
Define css selectors or xpath in the libraries file to determine whether the library should apply.
Library Manager
Create libraries in the UI to attach to pages with visibility rules.
Single Content Sync
Export/Import content.
Configure allowed entities to use export tab.
Configuration > Content Authoring> Single Content Sync Settings
Webform
Flexible form builder with some powerful features like sending emails.
Entity Tasks
Move entity tasks (IE tabs, view/edit buttons) into a floating block or admin toolbar.
Other modules:
Purge
Clear CDN cache.