Project DescriptionAn extension leveraging the Word Automation Service.
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This packaged solution provides a simple Web feature to convert supported file formats into other file formats via the way of the Word Automation Services.
A (currently) simple interface allows you to select one or more supported documents and select the output file format.
Highlight the selected files and click Convert Documents:

Select the output file format for each file and click Convert:

View the status of jobs:

View the history of conversion jobs:

The Word Automation Services timer job runs every 15 minutes and will output the selected files into the same location as the original files.
The new SharePoint Designer Workflow Custom Activity, available for both SharePoint Designer 2010 and 2013, allows you to convert documents via a workflow. For example, here is a workflow that is set to automatically start on a specified Document Library. The workflow allows you to prefix the document with a specified string.
Custom Activity:

Workflow which converts DOCX files to PDF:

Document Library where workflow will automatically start after dragging files into it:

Finally, after the Word Automation Services timer job has completed, the new PDF files are available:
