For a bedroom space! (for privacy while maintaining an open feel) -- 29 Sneaky Tips For Small Space Living : listotic
Like white French internal doors for some rooms like living room - Newland Pine French Doors - Internal French Doors - Interior Timber Doors -Doors & Windows - Wickes
Modern sliding glass doors to small outdoor space
For between open plan & TV room: Easi-Slide White Shaker 1 Pane Sliding Door System in Four Size Widths with Clear Glass and sliding track frame.