Anybody vote Green?
The Green party, advocates for the environment, have managed to pick up steam in Europe. They've never gotten close to any ruling status, but they've had minorities in parliaments. Canada elected their first Green Member of Parliament this month; the Greens received about 6 percent of the popular vote. Not bad.
The Green party is slow coming in the USA. in Arkansas they have to fight every election to get their name on the ballot.
The rules stipulate if you don't get at least 3% of the popular vote on election night then you can't be placed on the ensuing ballot without jumping through a number of hoops.
Here's an additional discussion on the subject with some interesting comments.