You can mark and annotate youtube videos with a customized player to mark sections, etc. This embed plus tool is a fascinating one to use with students and in blog posts.
Open source free screen recording software. I've used it in my classes as a substitute for Camtasia.
Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
Never miss an episode
Get the 10-minute Teacher Show delivered to your inbox.