Modules for Backdrop CMS

Other View Filter enables you to filter the contents of one view by the
contents of another view. You can either filter by items that exist in the
other view or filter by items that do not exist in the other view.

Field Readonly displays non-accessible fields in edit forms as read-only items.

Modules like the essential Field Permissions allow to make fields non-accessible by completely hiding them in edit forms even if user has the permission to view them.

About

The Duplicate Images module allows you to find and remove duplicate images
and other documents on the public or private file system.

Adds the ability for inline form errors. The error messages will appear next to the relevant field with the error, in addition to the message at the top of the form. This improves usability and accessibility.

A module that enables embedding drupal blocks in CKEditor. It currently uses the
insert_block module to render the blocks but this functionality may be moved
into the module to reduce dependencies.

Provides additional Views handlers for Ubercart's Attributes, Options and Adjustments.
These additional Views fields, filters and relationships are helpful to produce
more complete Views of Products and Ordered Products.

The Read More Extra Field module replaces the default "Read more" link
(displayed when nodes are rendered as teasers) by an extra field.

Why and when is this module helpful?

Provides two helper widgets for the Field API:

Provides a search form block in order to show a search input anywhere on your site.