Camtasia is one of the most popular screen capture software applications for Windows and the Mac and is produced by TechSmith. Use it to record on-screen activity or import HD camera video, customize and edit content, and share your videos with others. It has similar functionality to Captivate, can record and export PowerPoint presentations as movies and has a good selection of output file formats.
Camtasia is an app that you buy and install on your computer. Educational discounts are available, and a free, fully functional 30-day trial is also available.