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.
This widget will submit your wordpress RSS feed to feedvalidator.org, and check the results to verify your feed is valid.
A simple plugin for streaming (live tv) with livestream.com and shortcode with WordPress. Multiple livestream possibility
Show an awesome looking notification bar on your website, that you can customize to match your theme.
One-click ColorBox lightbox integration with NextGEN Gallery. Only loads when a gallery shortcode is present.
EMC2 Popup Disclaimer places a specified post into a lightbox and adds buttons so that your visitors must click through to agree to your terms!
Awesome Background Image Slider Plugin for WordPress which creates fullscreen image slideshows inside your WordPress Site Background.