Bandicam Screen Recorder is a screen capture program that allows you to record what's happening on your computer screen as a video or image. This utility tool is actually an excellent alternative to Camtasia.
Developed by Bandicam Company, you will be able to record various lectures, webinars, games, and even Skype calls. Furthermore, it offers an option to add narration from your microphone as well as video from your webcam. You can possibly share the output on different platforms like YouTube or Vimeo. This is a free solution that you can install on your Windows desktops.