uPano (Panoramic Solution for Unity) is a universal multi-platform solution for displaying dynamic and static panoramas, and creating virtual tours.
uPano is very easy to learn and use, and is great for people who do not have programming experience.
Visual Tour Maker lets you create virtual tours in minutes.
In most usage scenarios, you can make interactive panoramas without creating your own scripts.
If you have some very specific purpose, uPano has a powerful and easy-to-use API that will allow you to implement any behavior.

We have released a new version of the uPano asset, which has added Time Switch, Sync View and many other new features.
Changelog:
[Documentation] Documentation redesigned to HTML format.
[Examples] Added Time Switch and Sync Panoramas example scenes.
[Integration] Added integration with Fingers - Touch Gestures.
[Interactive Elements] The hotspots and directions now have the same layer as the panorama.
[Plugins] Added Sync View plugin.
[Plugins] Added Time Switch plugin.
[Tour Maker] Added the ability to use cubemaps in tours.
[Unity] Removed support for Unity 2017.x - Unity 2018.3. Now the minimum version is Unity 2018.4.
[Update System] Fixed display of special characters in the changelog.