Cabin built for $500 with re-purposed windows in the mountains of West Virginia (with probably very little energy efficiency, but hey, it's pretty).
http://www.apieceofrainbow.com/diy-sheds-reclaimed-windows/ 12 amazing DIY sheds and greenhouses: how to create beautiful backyard offices, studios and garden rooms with reclaimed windows and other materials.
This is pretty... maybe the walls for the "den" with the bookshelves, with a regular roof instead of a "greenhouse" roof.
DIY Farmhouse Bathroom Vanity Light Fixture -
Hey, I found this really awesome Etsy listing at http://www.etsy.com/listing/157040766/old-window-customized-repurposed
this old window frame topped by a shelf would be great to frame a quilt scrap or black and white family photos
Reclaimed Window Coffee Side Table by dharmadesigned on Etsy, $375.00
Free plans to build a gorgeous reclaimed window and reclaimed wood Potting Bench! - A Piece Of Rainbow
Reclaimed window chalkboard shelf by TKLdecor on Etsy