Embedded application

Proof-of-concept required. I'm looking for an embedded application inside a web-page that, once security accepted/downloaded, will run entirely on the visitor's PC. This application will simply scan through the visitor's PC and find all unique file extensions. For each unique extension found, it will check how many result pages exist in Google and then communicate this back to the web-server (E.g fileExtension|numberOfResults) where the results are stored in a database. ## Deliverables Embedded application will be coded in Java not Silverlight.