Floorplanner.com is free, online (no installation), the top search result for 'floor planner', and excellent, somehow existing for years without the magical iPa

Floorplanner.com is free, online (no installation), the top search result for 'floor planner', and excellent, somehow existing for years without the magical iPad ecosystem or whatever. Of course it is Flash-based, so if anything iPad users actually have less options in this space than everyone else.