Nelson with Robert Adamson Smith (2007)-- Windows only, unchangeable contents.
Smith's system represents all pages as slabs within a 3D space, moving between 3D positions on user command. Highlighted sections of text are separate 3D objects ("tetroids", named after a shape in the game of Tetris) connected by beams. Pages, tetroids and beams are all objects sworfing (swooping and/or morphing) together. The system was intended in principle to fetch contents from the net, but did not reach that stage.