VRML2.0 PROTO library - Large and interesting collection of VRML prototypes by Peter Gerstmann. Aimed for CosmoPlayer, most work in nowadays browsers too; the rest work with some editing). - http://accad.osu.edu/~pgerstma/protolib/
VRML/Java/JavaScript FAQ - Frequently Asked Questions about the intersection of VRML, Java and Javascript. - http://www.aereal.com/faq/
A Beginner's Guide to VRML - Ground level introduction to VRML (Virtual Reality Modeling Language it outlines some basic concepts necessary to begin designing and authoring VRML worlds. - http://wp.netscape.com/eng/live3d/howto/vrml_primer_index.html
Cybertown World Builder's Guild - Offers tutorials and tools for VRML with a gallery of objects, and FAQs for Cybertown. - http://philliphansel.com/
Roland Smeenk's website - Useful tutorial and scripts sections, such as the plugin detector. Also includes his EG2001 winning game, Elevator Attack. - http://www.smeenk.com