Via Popular Science, here is a video from two researchers at Cal Tech. It shows water droplets bouncing off a surface made of carbon nanotubes:
The surface is superhydrophobic, which is to say that it repels water to an extreme degree. From the PopSci page:
Hydrophobic materials have all kinds of practical applications, from creating surfaces that never have to be cleaned to making supertankers and container ships glide more efficiently through the water.
The News Fatigue 