For areas that require a more minimalist look, a blind is very often a lovely solution.  I work with a company called Luxaflex who create lovely honeycomb style blinds which fit inside the window frame, therefore avoiding problems with door handles and move with any opening windows.  Roman Blinds are also a neat way to dress a window, and use far less fabric than a curtain.

Japenese Sliding Panels

Japanese Sliding Panels are a very neat way of providing window covering.  Each flat panel slides behind the other, and can be drawn right to left, left to right, or split to be pulled into the centre.