Handy Stuff
Floppy's VRML tutorial

Concise simple explanations and examples of how to work with VRML 97. In my case this was an excellent place to start learning the language and concepts before exploring new features added in X3D.

X3D: Extensible 3D Graphics for Web Authors

(Requires access to the ACM digital library.)

X3dom Tutorials
X3dom Examples & Tech Demos
X3dom simple examples

X3dom browser compatibility test

Web 3D.org maintained resources page for x3D

X3dom Navigation Instructions

X3dom documentation

X3D absract specification
SHL Open Workshop Exercise: 3D Visualisation for Humanities Researchers