In Creative Mode, you have unlimited resources (meaning you will never run out of blocks), the ability to fly, and some blocks you cannot find in Survival Mode such as Mossy Cobblestone and Mossy stone bricks. Also, you can break every block (except liquids) instantly. Non-hostile mobs now spawnable (Sheep, Cows, Pigs and Chickens.). Plus, you have buckets now (lava, water and empty bucket.). Creative Mode is a great place to experiment with objects, mess around or build things. In 0.8.0, there were 4 creative tabs installed.