Modules for Backdrop CMS

Permalink Filter provides a content filter that automatically adds permalinks to
heading tags in your content.

Provides an API to duplicate / clone an entity.

Provides next and previous navigation on entities.

This module allows you to control the length and format of generated content
for text and long text fields. This only applies to generation of node content
for now.

Charts module provides a unified format to build any kind of chart with any
chart provider.

Javascript multiselect calendar widget using the MultiDatesPicker library on
top of the date_popup module. This will provide a new date_multiselect widget
to use on the date, datetime, and timestamp field types.

The PHPExcel module allows developers to export/import data to/from Excel files.

The idea behind this module is to have a single module for handling the export or
import of Excel files, instead of multiple modules handling specific cases.

Using the Field Wrappers module, site administrator will be able to choose HTML
wrappers for Fields. Normally the Field API uses DIV elements to wrap fields,
labels and its data.

The Menu Node Views module provides Views integration for nodes assigned to the menu system. It adds new, menu-related filter/sort criteria and fields to those available by views. (This module is in alpha development.)

The Easy Breadcrumb module provides a block with an alternative URL-based
breadcrumb trail.

xautoload is a comprehensive and yet highly efficient PHP class loading suite.

Most importantly, it provides Drupal-8-style PSR-4 (and the old D8 PSR-0-style in "lib") autoloading for Backdrop. But it is also a great tool for 3rd party autoloading.