GLSL Hacker 0.5.0 (Windows / Mac OS X / Linux)
If you have enough space and time to download 3.6GB of terrain data, you may try it on your PC (warning: it has only been tested on Windows XP, with an NVIDIA GeForce 7900 or 8800). The demo is available here:http://evasion.inrialpes.fr/~Eric.Bruneton/demo.htmlOtherwise you can see some High Quality videos here (made with more precise data and more realistic shaders - 16GB terrain, clouds, shadows, procedural details):http://www.youtube.com/watch?v=7s4G1J9Hiwkhttp://www.youtube.com/watch?v=hqWmSEUV5jghttp://www.youtube.com/watch?v=ehmvVAoSf8MThere are also high-res stills (8000x6000!) made with the same software here:http://evasion.inrialpes.fr/~Eric.Bruneton/srtm90big/