I bought a set of 25 cards at the Destin Spin-In for card weaving, mostly because, when I said that I was interested in historical renactment, everyone seemed to say, "So you card weave?"  It’s also apparently called tablet weaving.

Here’s some instructions I might follow, from Earth Knack: Stone Age Skills for the 21st Century.

Here’s a software pattern generator. With a pattern gallery:

Here’s a page about it, with very nice photos.

Here’s more, with photos of looms that hold the warp.

Here’s a String Page.