Genealogy Trails began in 2000 for the state of Illinois, expanding in 2006 to cover additional states. Access to records is free and they are busy working on adding databases to their growing collection of records, daily.
One of the nice things about Genealogy Trails is the hosts of the site are required to add data to their sites. For the unhosted sites, Genealogy Trails has a team of volunteers that work on adding data. What does this mean for researchers? Well, it means there will always be new information available instead of links to sites that sit for years with no new content added.
They also have a transcription team, which you can join, to transcribe records. As of this post, they are working on transcribing Civil War headstones.