Both the Libertarian Party and the Green Party have compiled a list of their 2011 nominees. Here is the Libertarian Party list. Here is the Green Party list.
One candidate is on both lists. Chris Edes is the nominee of both parties for Monroe County legislator, district 24, in upstate New York. Because the Green Party is ballot-qualified in New York and the Libertarian Party is not, Edes, who has support from both parties but who is a Libertarian, will appear only as a Green. He needed no petition to get on the Green Party primary but would have needed approximately 500 valid signatures to appear in November as a Libertarian. As the commenter below explains, he did need the support of Green Party local party officials in order to be on the ballot.