This is a list of softwares, players and web browser plug-ins that are made to display VR photos.
DevalVR - plug-in / Windows / FREE

FlashVR - software / Windows / OS X / License

FSPViewer - player / Windows / Unix with WINE / FREE

Panmap - (not very clear what and how it works)

Pure Player for Java - java applet / ALL / FREE

PangeaVR - plug-in / OS X / FREE
Panorado - java applet / ALL / License

PTViewer - java applet / ALL / FREE
QuickTime - player / Windows / OS X / FREE

SPi-V - player, plug-in / Windows / OS X / License

Discontinued:

CubicVR - bought by an undisclosed company.
iPIX - Bankruptcy. May continue under a different name.

Last update: 19th September 2006