pbackx

AdHerder is an automated A/B advertisement testing platform. Create your ads and AdHerder will select the best ad for each individual user.
This means you can create any number of ads to display in a wordpress widget and AdHerder will perform the following functions:
<ol>
<li>Keep track of which ads are converting well so that you can turn off poorly performing ads.</li>
<li>Don’t show the same user the same ad over and over. If they didn’t click the 3rd time, they’re not click the 5th.</li>
<li>Don’t show an ad the user has already clicked on. Show them something new.</li>
</ol>
All behaviors are completely configurable.
AdHerder will automatically track clicks on links and can track just about any desired behavior. Please see the FAQ section for information on how to track Facebook likes, Twitter follows and Mailchimp signups.

AdHerder

AdHerder is an automated A/B advertisement testing platform. Create your ads and AdHerder will select the best ad for each individual user.

Sam Margulies

Ever have one erroneously entered custom field name confuse all of your users and you just can’t figure out how to get rid of it? Delete Custom Fields will let you delete every instance of a custom field from your site. Once your remove a custom field using this plugin it will not appear in your list of custom fields when you edit a post or page.

Delete Custom Fields

Doesn't show all custom fields, though (even if you choose Show Hidden) - would be nice to have them as a list instead of a dropdown, but otherwise it does what it promises.

Works

Remove every instance of a custom field from your site.

AdHerder vs Delete Custom Fields