Floor plan drawing program?

[Alan Dayley]

Is there a program out there for Linux that allows one to draw a home
or office floor plan?  I don't need CAD quality here, just fairly
accurate relative sizes of furniture and walls.  Then one could drag
the furniture around the room to figure out a new layout.  I used to
do this with a ruler, sissors and graph paper but I'd rather use
something more virtual.

Alan