screencast softwares

Windows 7:
 Screencast-o-matic
see http://teaching.software-carpentry.org/2014/05/30/motivational-screencast-for-data-structures-in-r/#comment-10949

  Camtasia

OS X:
 QuickTIme

screen-flow
https://www.telestream.net/screenflow/

OBS, open broadcaster software
OpenShot video editor