I guess almost all the 360 photographers know about PTGui, a kind of professional photo stitching software, like panoweaver. You can find the features and differences between PTGui and PTGui Pro .
I use 3dVista and Cappasity. I heard about PTGui from my friend, who worked for some online outlets and now cooperates with college essay writing service. The license seems to be affordable enough, but I think to start with the trial