FactCheck.org is a "nonpartisan, non profit 'consumer advocate' for voters that aims to reduce the level of deception and confusion in U.S. politics." They "monitor the factual accuracy of what is said by major U.S. Political players in the form of TV ads, debates, speeches, interviews, and news releases."
The debates and candidates are featured prominently on the home page and there is also a tab for the 2016 election in which you can fact check by candidate's name. Also of interest might be their sister site, FlackCheck.org, which "provides resources designed to help viewers recognize flaws in arguments in general and political ads in particular. Video resources point out deception and incivility in political rhetoric."
League of Women Voters is a national, non-partisan political organization, with local chapters, that is formed around the concept of advocacy and educating people about public policy and issues. This site will give the basics about how and where to vote, and is a great starting point for topics about election improvement, voter protection, etc.
Project Vote Smart is another stellar, non-partisan, not-for-profit site and organization that charges itself with researching and providing information about candidate biographies, voting records, interest group ratings, public statements, campaign finances, and stance on the important issues, which is summarized in the site's "Political Courage Tests" asking the candidates what items or issues they would support if elected.
Politico.com is another big name is political reporting that you may have even seen featured on the Daily Show from time to time. They tout themselves as providing "insider-like access to Washington and the latest from the world of politics." Here one finds a section devoted entirely to the 2016 election (under "sections" in the menu).