Embedit.in

Embedit.in is a free service that lets you embed documents into your website.  You simply select the files from your computer and they are embedded.  You have the ability to choose how people can interact with your content, whether it can be downloaded or printed, depending on whether you want to protect it or share it openly. 

When you select a file, you will get a list of services to choose from, these allow you to login to embedit.in without creating a new username and password.  After that, you get a screen with the embed code.  You can decide whether it is to be a fully embedded file, a thumb that opens another screen to view the file, or a link to the file.  Then you can change the width and height to your liking as well as the colors. 

Very simple and easy to use and I love the customizable features.