ActivePresenter: A Screen Recorder, Screencasting and Rapid eLearning Authoring Tool

ActivePresenter is available in free edition:

• Free Edition: Video(WMV, AVI, MPEG4, WebM). FREE for personal and non-commercial use. No Watermark, No Time Limit!

http://atomisystems.com/download/

también tienes la alternativa de Loom

site en castellano: ActivePresenter en español (google.com)