This module adds the ability to reference non-existing (new) nodes right from nodereference field when You're adding or editing the node.
It's recommended to use this module with a Form restore module. It simplifies the workflow and enables support for multi-step chained nodes creation - if the content type of new node have nodereference fields it is possible to add and reference from it and so on (up to 10 steps now supported).
The clone module allows users to make a copy of an existing item of site content (a node) and then edit that copy. The authorship is set to the current user, the menu and url aliases are reset, and the words "Clone of" are inserted into the title to remind you that you are not editing the original content.
Gives editors the ability to schedule content, media, commerce products and taxonomy terms for publishing and unpublishing at specified dates and times in the future.
The link module provides a standard custom content field for links. With this module, links can be easily added to any content types and profiles and include advanced validating and different ways of storing internal or external links and URLs. It also supports additional link text title, site-wide tokens for titles and title attributes, target attributes, CSS class attribution, static repeating values, input conversion, and many more.
Drupal 7: Fields API is provided already by core [no dependencies].
Drupal 8: Link module is in core now. No module installation needed. Yay! Don't forget to activate it. It's deactivated by default.
INFO Since some misleading user reports we need to clarify here - Link module is NOT about to add links to any menus or the navigation nor primary/secondary menu. This can be done with default menu module (part of Drupal core). The Link module provides an additional custom field for storing and validating links to be added with any content type, which means another input block additional to your text-body, title, image and any other input you can make on new content creation.