Adding Lyrics to a YouTube Video (Thanks Maureen for sharing) - Here's a link that tells the steps: http://www.ehow.com/
Kahoot - A fun interactive quiz like website. Teachers create a free account and then you can either generate your own quizzes/questions or use ready made quizzes. Ready made quizzes can be modified to fit your needs.
GoNoode - Fun way to provide brain breaks to you class. Teachers create a free account.
Plickers - Another way to collect student responses. Teachers create a free account.