Document Conversion with Word Automation Services
Word Automation Services Service Application in SharePoint 2010 enables you to convert documents between type. i.e. Conversions from Word 2010 to PDF.
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How to add icon to represent PDF documents
How to add an icon to SharePoint 2010 to represent Adobe PDF documents that are stored in document libraries. See how with the DocIcon.xml
Related items with a Content Query WebPart
Show related items in SharePoint 2010 with a Content Query WebPart based on Managed Metadata Service. See this post to see how setup this configuration.
Prevent XSL namespaces to be rendered in result
How to prevent XSL namespaces from being rendered in HTML result. This can simply be done as shown in this post.