For maximum control and adjustment - I use Panorama Studio.
But for fast and easy - and pretty good results (like this) - Arcsoft Panorama Maker 4.
Although I did buy Panorama Studio - some time back - I now get most of my hundreds of programs free via direct file sharing download sites.
Perhaps - if you want the details - it would be best to email
me privately - rather than give the download info here.
All of the photos though - have been resized and adjusted/corrected in Photoshop - before uploading - and I run all the general images
through 'Advanced JPEG Compressor' as well - which quickly optimizes them to the smallest Kb size (adjustable) and still good viewing for the web.