Modules for Backdrop CMS

Send (authenticated) email through external SMTP servers.

Basic cart is a very simple shopping cart/checkout process for Backdrop, that
just sends 2 emails after each order. Along with the shopping cart, this module
also provides a block where you can view your cart's content.

Honeypot uses both the honeypot and timestamp methods of deterring spam bots
from completing forms on your Backdrop site. These methods are effective against
many spam bots, and are not as intrusive as CAPTCHAs or other methods which
punish the user.

This Mime Mail module provides functions that can be used by other
modules to accept an HTML message body and header, mime-endcode it
and send it via Backdrop's core mail system.
It also permits users to receive HTML email.

This module generates a block that asks for your unique PayPal ID and generates a simple donation form that connects to your PayPal account.

This is a highly flexible and easy extendable filter module to embed any type
of video in your site using a simple tag. Other modules can add video
sites/formats (called codecs) using an easy plug-in architecture.

A light-weight, customizable lightbox plugin for jQuery 1.4.3+. Iframed or
inline images or content can be displayed in a popup or modal "lightbox" above
the current page.

The Colorbox module:

Webform Remote Post is a module that works along the Webform module. It eases the integration between Webforms and other web applications (including systems like Salesforce and Eloqua).

Discussion forums for Backdrop.
Fork of the Drupal Forum module.

Installation

Enables the presentation of user registration, site wide contact, or node creation forms in blocks.

Installation