This page has a list of all individuals running for U.S. President in 2012 who have filed statements of candidacy with the Federal Election Commission, and who are Bylaws Sustaining Members of the national Libertarian Party.
It includes the following who have filed as Libertarians:
The following are Bylaws Sustaining Members of the national Libertarian Party and have announced their intention to run for U.S. President in 2012, but are not listed on the Federal Election Commission page referenced above.
*Information from LP.org*
Who is Paul Darr?
Paul Darr has lived in California, Oregon, Colorado, and currently lives in San Antonio, Texas. Paul is also an Army Veteran, who has deployed to Iraq and Afghanistan. On the political spectrum Paul is a Libertarian that advocates fiscal responsibility and social tolerance. Paul is currently employed as a Systems Administrator and is a father of a handsome boy and beautiful daughter. In his free time Paul enjoys reading, using and modifying open source software, gaming, and several other geeky pursuits.