JNetCAD - Java CAD viewer and converter
JNetCAD is a Java application for viewing and converting CAD data. It's
free for non commercial or educational use. It supports reading 3DS, BGF, DXF, JT, OBJ and
STL and writing DXF, EPS, JSON, JT, OBJ, 3D-PDF, STL and VGF.
All im- and export modules are available as Java libraries, which give access to the geometries.
Learn WebGL with three.js
WebGL (Web Graphics Library) is a JavaScript
API for rendering interactive 3D graphics within any compatible web browser without the use of
plug-ins. (Wikipedia)
Based on the famous NeHe OpenGL tutorials, these tutorials will guide you step by step through hardware accelerated 3D browser programming with the WebGL wrapper three.js.