TapPainter - This powerful little app lets you picture your home with a new fresh coat of paint. TapPainter lets you select colors using a color wheel or a fan deck just like the paint store. Already have a swatch from a store? You are even able to enter a swatch color code. This app is great for when you are deciding to paint a room in your home and want to see what it will look before you commit.
Auto Desk Homestyler - Extremely powerful home app. Homestyler lets you create an entire virtual floorplan; decorate it with 3D furniture, lighting, appliances, and more. With this app you can build the room of your dreams and get feedback from a huge community of designers.
Photo Measure Lite - With this app your are able to snap of a photo of a room in your home, then add measurements and dimensions for a visual reminder. You are also able to organize photos by room.