Paragraphs is a popular module that allows you to create components which can be used on an article or basic page for example. It’s a module which I’ve used on all of my projects for the last half-decade.
A lot of media functionality has been added into Drupal core over the last few releases. First, we got the Media module in 8.5 which offers fieldable media types.
If you’ve done any web development in the last couple of years, then I’m sure you noticed that JavaScript libraries and frameworks have become popular.
Code generators in Drupal are great as a productivity tool. If you need to create a module, you could easily run a few commands and have a module generated.
Webform has a pretty robust system for managing lists of options. When you create a select box, you can define its options just for that element, or use a predefined list.
The Layout Builder module allows you to customize the design of the entity such as content types, vocabularies, etc… by offering a new drag-and-drop interface.
Gutenberg is the new editor for WordPress 5.0. It’s a new style of editor/page builder. Instead of writing text in a single text area, you build a page using blocks.