test_3D rotator2d <iframe src ="http://chemdoodle.few.vu.nl/pages/rotator2d_test_3D.php" width="640" height="480"></iframe>
test_3D transformer <iframe src ="http://chemdoodle.few.vu.nl/pages/transformer_test_3D.php" width="640" height="480"></iframe>
test_3D rotator3d <iframe src ="http://chemdoodle.few.vu.nl/pages/rotator3d_test_3D.php" width="640" height="480"></iframe>
test_3D viewer <iframe src ="http://chemdoodle.few.vu.nl/pages/viewer_test_3D.php" width="640" height="480"></iframe>