X1 has a pretty nice desktop search product. Windows 7 comes with a built-in search indexer. Is there a free/open source way to make the Windows 7 search return search results like the X1 client?
The specific features I like are the file-type based tabs - so I can quick go to emails or to, say, PowerPoint slides, the quick filtering by text matching on different properties of the files, and the sort ability based on those same properties of the files.

