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.
Allow authors to share ad space for their posts on your blog and set how often your ad displays vs the author's ad
Provides a UI to manage your site's transients. You can view, search, edit, and delete transients at will.
Easily see which comments have not received a reply from each post's author.
Lets the admin add "featured" or "buried" css class to selected comments. Handy to highlight comments that add value to your post.
Popular Posts will display the posts according to the filters applied from widget settings.
A Simple plugin to show latest Tweets from a multiple Twitter accounts in the same sidebar widget,post,page or text widget content.
Automatically add an author box below your post content, with social profile icons