FEC - 2016 Presidential Elections
Provides current presidential filings of all candidates; contribution search by donor, employer, city or zip code; interactive state map.
The New York Times - Fact Checks of the 2016 Election
Checking assertions made throughout the 2016 presidential campaign.
OpenSecrets.org - 2016 Presidential Race
Detailed financial information including the campaigns, outside committees, bundlers and donors.
TheBigProject - US Elections
Extensive directory of news coverage from worldwide media sources plus links to government, political, campaign finance, polls and humor sites.
Wikipedia - United States Presidential Election, 2016
Crowd-sourced encyclopedia article about the campaigns, candidates and elections.