Hilder Santos

Tired of link every Twitter profile cited in your posts and pages? Birdfy allows you to automagically transforms your @users and #hashtags markups in your posts/pages into links to Twitter profiles/hashtags search.
All you have to do is install this plugin, and you’re good to go.
Features
<ul>
<li>Automatically discovers @ and # content into your posts and pages (excluding e-mails, dots after usernames and so on);</li>
<li>You can disable users and/or hashtags discovery both globally or in individual posts/pages;</li>
<li>Optionally, you can choose to open the links in a new window/tab.</li>
</ul>
Usage
Simply install the plugin and start to cite Twitter profiles by using @ before the twitter username you want to link, and the plugin will transform it into a link to the profile. Same with hashtags, by simply use # before any word – like in Twitter.
If you want to fine tune the plugin, you still can go to the Options page, named “Birdy Settings” (inside the Settings menu) and enable/disable the options you want. Remember that this options will act globally.
You may want to disable @users/#hashtags links in individual posts/pages also. In this case, just disable what you want in the box created inside your post/page administration page.
<h3>Contact</h3>
Want to contact me? Just drop me your suggestion, bug, congratulations and so on at hilder[at]hildersantos.com, or contact me on my <a href="http://hildersantos.com/contato" title="Link to my contact page" rel="nofollow ugc">contact page</a>.

Birdfy – Twitter markups for WordPress

Birdfy is a plugin that allows you to use @users and #hashtags markups on your posts and pages, and to link them to Twitter.

scribu

AyeCode

Stiofan

Alex Ciobica

This plugin allows you to create many-to-many relationships between posts of any type: post, page, custom etc. A few example use cases:
<ul>
<li>manually curated lists of related posts</li>
<li>post series</li>
<li>products connected to retailers</li>
<li>etc.</li>
</ul>
Additionally, you can create many-to-many relationships between posts and users. So, you could also implement:
<ul>
<li>favorite posts of users</li>
<li>multiple authors per post</li>
<li>etc.</li>
</ul>
<h4>Support & Maintenance</h4>
AyeCode Ltd have committed to security and maintenance updates due to this plugins requirement in our <a href="https://wpgeodirectory.com/downloads/list-manager/" rel="nofollow ugc">List Manager Extension.</a>
~~I, scribu, will not be offering support (either free or paid) for this plugin anymore.~~
If you want to help maintain the plugin, fork it <a href="https://github.com/scribu/wp-posts-to-posts" rel="nofollow ugc">on github</a> and open pull requests.
Links: <a href="http://github.com/scribu/wp-posts-to-posts/wiki" rel="nofollow ugc">Documentation</a> | <a href="http://scribu.net/wordpress/posts-to-posts" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Posts 2 Posts

It works great. The options are beautiful, thought for every need, for example change a label or show only "to" box.

Works great

I'm working with WordPress, after some updates or actions the plugin starts to work incorrectly. The code is completely unreadable and can not be changed, the author abandoned his creation.
You can use - https://wordpress.org/plugins/npc-neatekpostconnect/

Huge load, unreadable code, Alternative for that plugin

Efficient many-to-many connections between posts, pages, custom post types, users.

Birdfy – Twitter markups for WordPress vs Posts 2 Posts