You're looking for QTVR Studio, which was a Classic app. It turns up on eBay periodically; it's not hard to find.

However, QTVR Studio has a pretty lousy stitcher. I use hugin to generate the panorama image and then use QTVR to convert it. It will then play in any version of QuickTime, including on OS X. I took a panorama of my old apartment that way, so I can always go back to "the way it was"