These are the most beautiful Rangoli Designs/Patterns I found on Flickr. I hope these will be useful in making your own Rangoli designs.

© Murli Nambiar http://www.flickr.com/people/murlinambiar/

© Black Sapphire http://www.flickr.com/photos/blacksapphire/

© Ankita http://www.flickr.com/photos/68440691@N02/

© Ankita http://www.flickr.com/photos/68440691@N02/

© Preethi Rajaganesh http://www.flickr.com/photos/preethirajaganesh/

© Preethi Rajaganesh http://www.flickr.com/photos/preethirajaganesh/

© Preethi Rajaganesh http://www.flickr.com/photos/preethirajaganesh/

© Preethi Rajaganesh http://www.flickr.com/photos/preethirajaganesh/

© Pooja Sinha http://www.flickr.com/photos/21473042@N02/

© JWR Weatherley http://www.flickr.com/photos/weatherley/

Spotted a nice one, post in comments, so everybody will know.