I ran across this site from a major manufacturer of industrial lasers. http://www.synrad.com/Applications/archives.htm
They have done a huge number of tests on a wide variety of materials, and have the results in a handy searchable list.
While a lot of these are special purpose, there are some cool things on their list I had never thought about like…
There have to be more like this out there, what sites have you come across?
@jeffarazzi says -
I found these free ebooks on obrary.com, which get into materials and techniques — Lasercutter 101 eBook: http://info.obrary.com/download-the-laser-cutter-101-ebook?submissionGuid=23bd8446-9de6-4180-8681-446198fd55665
Advanced techniques eBook: http://info.obrary.com/download-the-laser-cutter-advanced-techniques-ebook?submissionGuid=69a4a7b6-d47c-4aa7-9461-532e698cb0d14
Laser Cutter Business eBook: http://info.obrary.com/download-the-laser-cutter-business-guide-ebook?submissionGuid=c1460e55-77c5-4e62-969a-f1bc012bddab5
If you dig around on their site, there are also free downloadable laser cut designs such as a dollhouse, stools, toys, model ships, and even cut your own mahjong tiles.
Here’s a good basic starter article with lots of links.
Another resource that is absolutely filled with info on lasers of all types in a no nonsense format