Really, I’m pretty excited about this one. I know it has been around for a while. I learned about it from an older blog post by Daniel Rezac while 
trying to investigate some ideas for one of the math education students in our Classroom Technology course. Sketchcast allows users to create a screencast of sorts. The user can draw with the mouse, type on screen, import images and annotate them, erase, and include voice overs (if desired).
This is a great tool for teachers and students to make quick video introductions or reviews, demonstrate and talk through math problems and timelines, or explore any process.
No Time to Sleep 