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.
Integrate your social networks with Wordpress using this, fully customizable, Social Media Feed widget.
This plugin is no longer updated. It has been merged with an other plugin.
Add Custom SEO Meta tags for Wordpress posts and categories,.
Highly customizable plugin to let your site visitors to report posts with inappropriate contents to administrator / editor.
Super lightweight solution to changing all external links and internal PDF attachments to open in a new tab.