neon

<p>If you write something like “@nick, how are you?” this plugin will search for @nick’s url in the comment list of the current post and will convert his/her name to a link.</p>


Twitter style links

This plugin allows you to add Twitter style links to comments.

Nolongeractive

<p>The plugin picks out twitter usernames and hashtags and automatically converts them to working links to Twitter profiles and search pages. You will no longer have to manually create these links, it will happen automatically for all page, post and comment content.</p>


Automatic Twitter Links

This plugin automatically converts Twitter usernames and hashtags to Twitter profile- and searchlinks in pages, posts and comments.

Twitter style links vs Automatic Twitter Links