This blog post lists numerous low cost appropriate tech devices that can be made at the cottage industry scale and sold for profit. As the economy continues to erode, a lot of readers are looking for ways to make extra money. The following list has some ideas to get you thinking. There are many appropriate technology devices, and many different ways to make them. A complete list would fill a book (see Field Guide to Appropriate Technology), so use this blog post as a springboard to discover additional items. Search YouTube for instructional videos.