I've worked with RTV for years and have nothing but great things to say about them. They, like Vote.org, are nonpartisan. I can speak to our motivations, however: we want to see 100% voter turnout and don't give a flying fig who you vote for, as long as you vote. We've been criticized by both sides of the aisle for not appearing to have a political stance, but fuck it: voter turnout is too important to waste time on partisan games.