Immervision produces Java Applets and Panorama Builder programs with many functions, such as displaying Spherical Panoramas and the creation of Virtual Tours. Please look here: Immervision to see the range of products, of which many are free to use.
Controls: Click in the Panorama and drag the mouse to change view. Use the right mouse button to zoom in and out, or use the mouse wheel. Click on the blue menu bar for additional options.