CamStudio

I thought that CamStudio was a great free OSS program for creating videos. It was very easy to use and most of the time gave me little trouble. I used it to create my Google Docs video for the training project and it worked great. I would suggest doing a little research or watching a tutorial on the best ways to set it up before you get started to ensure you don't run into any problems. But other than that it's easy to use and a powerful tool for creating instructional videos.