what pano stitching software?

I've never shot any type of Panos before hence I've never used any type of stitching software either.

I do not have/use Photoshop.

Mr. Brenizer uses Autopano Giga but no way I can shell out that kind of cash at this time.

I've heard of MS ICE and I've heard it's a not at all bad piece stitching software but it plays ads on your PC?

What other options are out there?

Please help.
Thanks!

I didn't find the right solution from the Internet.

References https://www.dpreview.com/forums/post/57288688

Finance App Trailer