Evan Solomon

If you write posts scheduled for the future and want to link between them, this can help! WordPress has a great, fast tool for linking to posts on your own site, but it only lists already-published posts. Usually this makes sense, but if you do a lot of writing for the future via scheduled posts you may want to expand that.
<h3>Contribute</h3>
The code is available on Github: <a href="https://github.com/evansolomon/wp-scheduled-posts-internal-linking" rel="nofollow ugc">https://github.com/evansolomon/wp-scheduled-posts-internal-linking</a>

Internal Linking For Scheduled Posts

A very simple way to add scheduled posts to WordPress' internal linking system.

rickacc

Linked Future Posts Widget acts very much like the upcoming posts widget by displaying 
scheduled posts instead of published ones, but includes a link to each post (using slug/post name). Requires WordPress 2.8+
Use this plugin in conjunction with the Future plugin from Marion Sudvarg to create a Post Grid of scheduled events and a list of scheduled 
events on the post page. Events that change from scheduled to published status will automatically be removed from the grid and list.
Linked Future Posts Widget is a derivative of the Upcoming Posts Widget plugin created by Aaron D. Campbell.

Linked Future Posts Widget

A widget that displays a list of scheduled posts with links to the posts.

Internal Linking For Scheduled Posts vs Linked Future Posts Widget