Michael Dahlke

You (the project manager or WP admin) are constantly needing to tell your developer that you added/updated/removed a plugin 
on the live site so he can keep his dev environment semi-synced. This eliminates that need, by just shooting them an email 
with the plugin information and what happened.

Plugin Notifier

Automatically alert your developer when you install/update/remove a plugin.

Pat Hawks

dirtysuds

Will embed a PDF file using Google Docs Viewer 
Simply include the URL for a PDF document on it’s own line, or wrapped in the embed tag like <code>[embed]http://example.com/file.pdf[/embed]</code> and the plugin will embed the PDF into the page using the Google Docs Viewer embed code. 
The url must end with <code>.pdf</code>
Supported attributes in the embed tag are <code>class</code> <code>id</code> <code>title</code> <code>height</code> and <code>width</code>

Embed PDF

Adds pseudo oembed support for PDF documents

Plugin Notifier vs Embed PDF