Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
wp2syslog -- Global logging facility for WordPress (WPsyslog revisited)
Quick Favicon makes it easy to set up icons for your WordPress site. Favicons! iOS Icons! Android Icons! Windows 8.x Tiles! And more!
Allows you to add and remove featured images from admin post lists. Works with AJAX and magic for your image assignment pleasure.
Add Icono pure CSS icons to your WordPress site.
Add social icons to your WordPress menu items automatically.
This wordpress plugin has multiple facebook social plugins that can be used, easily customizeable, shortcode of each plugin. Simple but flexible.
You can display a gallery of the embedded Youtube and Vimeo videos within your site. They can be shown chronologically or as a random selection.
This plugin provides single sign-on capabilities for Discourse using WordPress user authentication.
Easily add Social Media Icons to your Wordpress Site
Categories/Taxonomies addon for the AFC Wordpress plugin http://www.advancedcustomfields.com