tomi33

Allows custom “link” post type which adds a Link URL value custom meta box to the post editor
This allows the posts to be easily redirected to the value of that link. (This will involve a small amount of code in the template used to display posts)
The main idea behind this is that you can easily build up a collection of links which you can tag with various key words.
From this you can quickly set up something in your templates/theme of choice to display related links on your blog posts or other pages along with a thumbnail without the need to type in the same links on all the pages
Note: This plugin does not do the redirect for you, you will have to do that within your chosen template
<h3>Instructions</h3>
Click “Links” just below “Posts” in the right hand side admin panel and create a new post, then give it a title, featured image and a link url value.
In your preferred method of displaying a list of links on the site, simply pull in the 3 attributes mentioned above to easily construct a link which you can customise with an image or different title, or change entirely.

Link Post Type

Allows custom "link" post type which adds a Link URL value custom meta box to the post editor

jstnlngls

This was built out of a need for a way to bring registered users into a conversation unfolding in comments on posts. I work with an art collective and we’re all posting multiple posts on multiple topics and as we’ve tried to shift more and more of our conversations out of email and onto our website, there didn’t seem to be an easy way to bring specific people into these comment conversations without using a more general comment notification plugin. Notify Tagged User attempts to change that.
This plugin would help out any multi author blogs, and in particular, teams or project blogs that focus on internal communication.
Basically the plugin works by using the familiar Twitter @user reply syntax in the following way: 
-check all new comments for the @user syntax 
-if tagged users are found, look through the database for registered users’ nicknames matching the tagged user 
-if a registered user’s nickname is found, get the associated email address 
-send an email to all users tagged asking them to join in on the conversation

Tagged User Notification

This plugin allows you to tag other registered users on your blog in a comment in order to bring them into a conversation they might otherwise be miss …

Link Post Type vs Tagged User Notification