Unico

Unico is a game with 66 cards, based on the traditional game Crazy eights.

Everyone gets 5 cards and must play a matching card (colour or animal/number): if they haven't a matching card, pick up 1 from the stock pile.
In the basic version there the following special cards:

chameleon: you can play it when you want, like a joker.
crab: play clockwise/counter-clockwise order.
kangaroo: the next player misses his turn.

In the advanced version, there also these special cards:

snake: you can exchange one card with another player.
hands: all player put their hand on this card. The last player draws 2 cards.

The first player to discard all their cards wins.

—description from the publisher