The Constitution Party held its national convention this weekend. Pastor, author, and 2004 Vice-Presidential nominee Chuck Baldwin was nominated over former Republican Presidential candidate Alan Keyes. Baldwin's website can be seen here.
The Libertarian Party will hold its national convention next month. Former Republican Congressman Bob Barr, who led the fight to impeach President Clinton, is the frontrunner for the nomination. Former Democrat senator and recent presidential candidate Mike Gravel is also running, along with a slew of others.
Ralph Nader is running as an independent, or possibly Green Party candidate. Former Congresswoman Cynthia McKinney is running for the Green Party nomination.