Copyright: my little pony
Originating in the 1980's as a line of plastic toys, My Little Pony has become a major craze, going on to spawn countless generations of toys, a classic cartoon, and the new cartoon by Lauren Faust. The new cartoon, and its fandom, has taken the Internet by storm. This fandom became such a surprise because of its large number of male members, and how loyal said fans were to protecting their belief that My Little Pony isn't just for little girls, but can be enjoyed by people of any gender/age.
There are many more, and not much space to put the rest.
The following are aliased to this tag: friendship_is_magic, mlp