function	product	cost
computer	iMac	$1-2 thousand
video screen recorder software	Screenflow, by Telestream	$99
writing tablet (optional)	Bamboo, by Wacom (various sizes)	$50-$200
transparancy overlay	Flysketch, by Flying Meat	free
headset (microphone). Do not use bluetooth!	USB H5400 (or similar), by Logitech	$39
equations	LaTeXiT	donation
book production	LaTeX	free
book viewing	Adobe Reader, by Acrobat	free
seismic data processing software	SEPlib	free from SEP, but installation, not included, might not be easy

Some students wanted to see how I make my videos, so I gave them this impromptu seminar. It is unedited and unpolished, but it does take you through the basics in 15 minutes.