Welcome to hySpherical. The major overhaul of this website is continuing although only few new panoramas appeared over the last weeks because of an extensive investigation into plugins and viewers. The DevalVR plugin used initially is based on the best panorama viewer but it is available for Windows only and requires Java, additional plugins or HTML5 to serve other operating systems or iPhone/iPad users.
Since HTML5 is offering more compatibility in future, this will be the new direction for the next panos to appear. A flash version will become the alternative for browsers not supporting HTML5 due to the widespread availability of flash players across many platforms.