PPeelen

This plugin lets you add your app’s position on the appstore to your blog. Simple add the Apple ID, select genre and range and your on the go.

Itunes AppStore App Ranking

This plugin lets you add your app's position on the appstore to your blog. Simple add the Apple ID, select genre and range and your on the go.

Ste-Bi

Use this Plugin if you are tired in changing URLs and prices on every Link to the AppStore on your page. This plugin updates all Data directly from the Apple Server. You also can setup caching-times for images and the content. If you have an PHG-ID the plugin automatically creates Affiliate Links to the AppStore.
You can easily add Links to the Apple AppStore with using [app ##idnumber##] in your posts, pages or comments. The ID number is the number from the official AppStore URL.
<ul>
<li>[appimg ##idnumber##] gives you the screenshots!</li>
<li>[appext ##idnumber##] gives you info, screenshots and a nice border.</li>
<li>BETA (use with care): You can use something like: [app 307658513]Developer:{trackname} 
Price:{price} {dllink} 
[/app]</li>
<li>With these tags: {trackname}, {sellername}, {dllink}, {price}, {stars}, {description}, {artwork100}, {artwork60} 
You can follow us for news on Twitter: http://twitter.com/AppStore_plugin</li>
</ul>

AppStore Links

Plugin for easy linking to (Mac) AppStore Apps. You can use the PGH-ID for automatically creating Affiliate-Links

Itunes AppStore App Ranking vs AppStore Links