Often times there is a need to have some good test data in lists or libraries for development, testing and demos. This post is specific to the SharePoint Work Acceleration Toolkit (SWAT) from iDevFactory. You can find the tool here http://www.idevfactory.com
SWAT has the capability to generate random child sites as well as documents (and metadata) for document libraries and list items for lists. This post will show you how to generate random documents for a document library.
In the Farm Tree window, right click on the site that you want to generate the test data on and select Show Site Details.

In the Site Details section, select the Site Lists tab.

In the Site Lists tab, right click on the document library that you want to generate test data for and select Generate Test Data

On the Generate Test Data screen, for the # of Items to Generate enter 500.

On the Generate Test Data screen, right click on the Title field and select Set Field Parameters.

On the Field Parameters screen, select Sentence and click Ok. This will generate a sentence instead of a single word for the Title field.

On the Generate Test Data screen, click Ok. This will kick off the process for generating our test data.

After the process is done generating our test data, we can navigate to that document libraries page and see the test data that got generated.

Enjoy!!!