Sing Books With Emily: https://singbookswithemily.wordpress.com/
KaraFun: http://www.karafun.com/. Listen and subscribe on YouTube, view on their website or download their app to your phone.
Listen and Read Along: http://www.listenandreadalong.com/ (click on songs) This website is run by the US State Department for students learning English as a second language. I expected the music on the song lyric videos to be created with a synthesizer but, surprise, they are beautifully performed and right up my alley!
Lyrics and guitar chords: http://www.guntheranderson.com/
Tons of great folk songs: Beth’s Notes
Reset Your Tired, Tense Voice Like Magic from Voice Council Magazine