Fast flip-pages
It’s tough to use the phrase “low tech” in connection to anything related to the Internet, but pure single-source html + css web pages might qualify. A series of these small (800px by 600px, > 10kb each) linked pages is my preferred method of chunking information. I find it ideally suited for tutorials, and if I understand Google Page Rank correctly, there may be SEO advantages.
For an example, see my VistaPrint business card editor tutorial.