What software program/equipment is used to make Khan Academy videos?

Sal uses a PC with:

• Camtasia Recorder ($200*)
• SmoothDraw3 (Free)
• Wacom Bamboo Tablet ($80)

Prior to that, he used:

• ScreenVideoRecorder ($20)
• Microsoft Paint (Free)

Mac users: In lieu of SmoothDraw, Autodesk Sketchbook Express works (free with a Wacom).

*Camtasia also offers a basic version of its software called SnagIt.