Completely free screencasting software. Downloadable. Use this for any tutorials you may want to create where the video shows your on screen activity. You can add narration.
Wow! I encourage you to watch the tutorial video for voicethread. You and others can collaborate on an artifact, draw on it, provide commentary on it (the most accented function).
This video narrates and screencasts the steps to incorporating a multiple choice quiz into a PowerPoint presentation in order to make it more interactive.