A popular way to monetize a WordPress blog is through display ads. These usually include banner ads provided by affiliate networks or display advertising platforms. AdSense is a revenue stream that takes only a few hours to activate; the ease of capturing that first dollar of revenue is a big draw to the platform. WordPress ads adsense widget lets you manage and place your ad scripts at desired spots into your websites.
These widgets give you the more control and options you have over your advertisements. So I’ll start with the simplest, and work my way to the more advanced. Don’t forget to give your most welcomed feedback to improve quality of our blog. You may want to take a look at the following related articles: Free Google Translate Plugins for WordPress, Premium Flat Design Themes for WordPress, Free Directory WordPress Themes and Free Popular Posts Widgets for WordPress.
1. Google+ Badge Widget
Our Google plus badge widget plugin will help you to display Google plus badge widget on your wordpress website, just add google plus badge widget to your sidebar and use it. You can easy way to setting & install this plugin. Change page type(e.g page,profile,community), Change Color Scheme(e.g Dark,Light), Change Layout, Hide or Show Cover photo, Hide or Show tagline, Multi language supports and more.

2. Login Page Designer
Login page designer provides you to easy way to customize the appearance of the WordPress login page with many options. Login Page Designer plugin have many option for customizing login page. You can easy way to setting & install this plugin.

3. Facebook Like Box Widget
Using Facebook like box widget easy and quick in your blog. This Plugin support you to customize Facebook like box in easy way. Facebook Like Box Widget. Facebook Like Box Widget is a social plugin that enables Facebook Page owners to attract and gain Likes & Recommendation Comments from their own website.

4. Scrollbar Designer
Easy-to-use solution to have a custom scrollbars compatible with desktop,laptop, tablet and phone devices. Simple installation and activation, it works with NO modification of your code. Very stylish scrollbars, with no occupation on your window (original browser scrollbars need some of page space and reduces window/div usable width).

5. Awesome Recent Posts Widget
WP Awesome Recent posts widget plugin provides easy way to show recent posts from your blog. Quick install and integrate, Supports post thumbnails, Supports custom taxonomies, Supports soring, offset & order, Supports published date & author, Supports posts excerpt with length and text and more.

6. Floating Facebook Like Box
WordPress Floating Facebook like box for wordpress is plugin that allow you to customize facebook like box with animation easily. The Floating Facebook Like Box lets you display on your website. Go to Settings > WPChandra Facebook Like Box Settings in your WordPress Dashboard. Fill out the options, including your Facebook Page URL. Click “Save” to save your changes. The facebook like box display on left or right side.

7. Responsive Background Image
Easy way to add fixed responsive background image to your blog & website. This plugin helps you to easy to add resposive background image!

8. Recent Tweets Widget
Twitter is one of the most powerful and highly influential social networking tool on the planet. You will need a Twitter account. If you don’t already have one, create an account. Click the blue “Create a new application” button. Fill out the required information and create your application. When finished, click “Create my access token.”

9. WP Live Comments Validation
Using WP Live Comments Validation plugin to validate comments form using jquery validation. This plugin allow you to easy way to validate comment form.

10. WP Header Cleaner
Easy way to clean unwanted links from header & footer.

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Great list. Thanks for putting it together. There is also one tool that takes AdSense to the next level by providing a testing platform to optimize AdSense ad units. And it’s free:
wordpress.org/plugins/adngin-your-adsense-your-traffic-maximized-revenue-for-free/