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.
Hyper Cache Extended is flexible and easy to configure cache system for WordPress. It's aim is to work on any installation.
Add Google Plus Profile Picture to Google Search Results. Very Easy to implement! Google authorship for multiple authors
Taxonomy filter is a plugin which allow users to filter hierarchical taxonomy terms inside admin pages and provides a way to hide terms for each user
This WordPress plugin adds color palettes to your branding and style guide pages.
The better tool for monitoring your plugins & themes, including support requests, download stats, version support, and more.
The easiest way to add multiple featured images (and lightbox) to WordPress.
Free customizable popup plugin with basic functionality. Supports Facebook, Instagram, Twitter etc. SEO friendly.