Actively maintained

This is an attempt to provide a framework in which commerce products and displays can reliably be indexed with minimal site builder input.

The Ponzi module promises to increase the number of comments a node has by investing some of them now now and returning twice as many later.

This module aims to facilitate hook debugging and implementations.
It displays each drupal core hook call on each page loaded.

This module provides a combination of CSS Styles, WYSIWYG settings, developer hooks, style guides, and well-designed CSS3 page templates to provide clean, accessible (seeking both 508 and WCAG 2.0 AA), and visually impressive styling. It does this in an attempt to help any theme provide consistent textbook styling for the production of online course materials without the need for advanced knowledge of CSS / HTML.

Replicate Field Collection Extends Replicate module to manage the cloning of field_collection entities and fields.

Basics

When you clone an entity (node, taxonomy term, ...) containing a field collection reference, the field collection items are not duplicated, and the cloned entity still references the same field collection than the original entity.
This poses great issues as any modification on the field collection will impact all the duplicated entities.

Replicate Field Collection correct that behavior and implements a clean duplication of field collections.
The replication is recursive, i.e will work on field collections containing field collections and so on.

Dependencies:

• Replicate
• Entity API
• Field Collection

Thanks:
Vincent Bouchet for his help on the coding and testing of this module.
All the people involved on the discussion: http://drupal.org/node/1233256, the first draft of this module was based on the patches submitted here.

Replicate module provides an API to duplicate / clone an entity.

Basics

Replicate provides a main cloning function, along with several hooks to control exactly how a field is duplicated based on its type, add info after cloning, and supports custom fields and entities. It is intended to developers and does not contain any GUI (for the moment anyway).

The goal is to provide a way to easily clone any entity, and to allow developers to be able to control exactly how entities are replicated, based on their type or the fields they contain, and to be able to easily extend the replication control to custom fields or entities.

But there already is a Node Clone module!

The Node Clone module focus on cloning using the administration interface and is designed only for nodes replication, whereas Replicate can clone any entities (nodes, taxonomy terms, users, ...). Replicate is developer-oriented, and let you manage the cloning process the way you want.
Node Clone has also only one hook to alter cloned nodes, Replicate provides several hooks to be able to work on a specific entity type or field type and thus writing the smallest amount of code required.