node

Control editing/visibility of individual fields by role.  

As well as custom settings ('create own', 'edit own', 'view own', 'edit any' and 'view any' - all per role), there's a Private setting which gives access to the author and administrator only. 

These are automatically applied to views.

Finding the setting: Look for  Field visibility and permissions – on the Edit tab, NOT Field Settings.

In /admin/people/permissions there's also a Access other users private fields permission.

Saves snapshot of content type form using AJAX.  Content types and save frequency can be configured.  No sign of a D8 port yet.

Adds a file browser to the CKEditor link dialog, so you can select files that have already been uploaded. Settings in Admin > Config > Media. In many cases will be better IA to add a dedicate file field to the content type and use that, or wait for the new media browser (currently being designed, follow the Drupal UX group.)

Allows you to prefill form fields by supplying values in a query string.  Syntax (also in readme) Useful for bookmarklets.  D8 alpha version.

Adds a trash bin for all content, so you may later restore (or permanently delete) it.  Depends on Content Moderation module.  Alpha in D8.

Allows you to group a set of fields together.  In active development for D8 but still a lot of open bugs at time of writing - project page says it will likely be replaced by Paragraphs.

Hours/minutes/seconds field type (formats: h:mm, h:mm:ss, m:ss, h, m or s). Drupal 8 in beta.

Gives you a checkbox for 'Unique' when editing fields - can have it checked during form entry (via AJAX) and specify a custom error message per field.  Seems to have bug where field you're checking is sometimes refocused (even if no errors) if you've already tabbed away from it and continued typing.

Build a custom list of nodes. The setup is via Admin > Structure. Currently D8 alpha.