Free WordPress plugins are one of the best things that can be found on the web – if you are a WordPress-wise businessperson! Each of these can be found at the Plugin Directory. You will find plenty of other like-minded plugins there, too, each with their own chance at fitting your needs like a glove.

1. WP125

This plugin will help you display your 125×125 banner ads in professional manner. You can easily manage the specific days for displaying ads and they will automatically be taken down. This plugin has simple and efficient interface with a number of useful features.

2. Advertising Manager

This plugin automatically serves ads from 15 ad networks and you can insert ads just by pasting the ad code. An interesting features you might be interested in: revenue sharing for websites that have multiple authors, support for multiple languages.

3. BuySellAds

BSA is a popular marketplace for selling and buying ad banners. This is an official BSA plugin that easily inserts BSA code to your blog. You can use widgets or manually insert a single function that returns your desired Ad Zone.

4. WP-Insert

This is thought to be one of the most powerful WP ads plugins nowadays and it impresses with tons of useful functions. It supports Multiple Ad Network Support, ten various ad widgets, and twenty custom ad areas. This is an eye-catching software for WordPress advertising.

5. OpenX WordPress Widget

OpenX WordPress Widget provides a simple, straightforward way to place ads from an OpenX AdServer on a website. But keep in mind that you must be signed-up as Open X publisher for displaying their ads on your blog.

6. AdRotate

You can easily add and manage the ads by showing a random banner on your blog. The plugin supports unlimited groups for banners allowing to tie certain banners to different areas of the website.

7. Post Layout

This flexible and efficient ad plugin allows inserting JavaScript or HTML created by Google AdSense, Amazon, BidVertiser, Chitika and so on – with this plugin it is a matter of copy and paste. You don’t have to be skillful programmer to do this.

8. WhyDoWork AdSense Plugin

Insert Adsense ads on your blog without modifying the template. Build original monetizing strategy by showing more ads to the new visitors and leaving up more clean posts for the regular readers. You can also block ads on specific posts and pages simply by putting a “no ads” tag.