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.
Displays extra columns (Alternative Text, Caption, Description, Permalink and File URL) in the media library view
Bookmark your favorite posts, pages or custom post types within the WordPress admin
Colorful Text Widgets is a normal text widget that makes your widget a colorful one.
Including standard flickr slideshows into your blog. Call your Flickr slideshow by adding [set_id=XYZ] to your content.
This plugin lets you define content templates to quickly and easily create new posts or pages.
Easy Popup Announcement helps you to display popup / pop-over / popup overlay on your WordPress website.
Sequential Post Number Display allow you to assign a sequential number(in chronological order) to posts and you can display it with each post.