- There is an Open Source java applet in the original [Panotools] distribution. It works in most java enabled browser, including those with the real JVM from Sun and those with the bad Microsoft implementation.
- Immervision has a free java applet with directionnal sound, animation and other advanced features which work with all JVM since version 1.1 (including IE and netscape ones). At this time this viewer is in Beta test version. (Applet Page)
- Ipix Expensive! Some users in the community feel that Ipix has done a lot of harm to the panorama community in the past years. Read more on this FFII page