RazielKanos

This plguin simply adds a CSS code into your Admin Dashboard and hides most of the nagging messages telling you 
that you should activate or register other GPL 2 Plugins.
It doesn’t add any functions other than adding the CSS code, so there should be no trouble with other plugins you are using.

WP Remove Admin Register Nag

This plugin removes the reminders that you should register plugins you got by a theme for example

Tibor Paulsch

Adds a button to the TinyMCE editor that puts a selected email address into a shortcode [email] and turns it into a mailto-link, which uses WordPress’ native antispambot() function to encode the emailadress so harvesters can’t get it. 
This is my very first public plugin, so please be gentle with your comments 😉
Find it on <a href="https://github.com/tiborp/email-shortcode-button" title="Plugin code on GitHub" rel="nofollow ugc">GitHub</a>

Anti SpamBot Email Button

Adds a shortcode button to the WordPress TinyMCE editor for easy anti spambot email links.

WP Remove Admin Register Nag vs Anti SpamBot Email Button