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.
Add the new Google +1 button to your WordPress site. Also available as a shortcode.
Add automatically Google +1 button to wp post or pages.
This plugin lets you embed music players, video players, tunewidgets, email collectors and other ReverbNation widgets on your wordpress blog.
Add the Google +1 button to your blog.
This widget displays a list of the blog's participants, with a link to their profile, and the number of posts and comments they have contributed.
Install a Facebook Fan Page widget for your wordpress blog.
Install a Facebook Like Button widget for your wordpress blog.
Add multiple widget with twitter follow button.
Add the Follow Button to your website to increase engagement and create a lasting connection with your audience.
This plugin adds a widget which let you display a list of categories in your sidebar with more features and flexibility.