I've been on the lookout for good panorama photo software to do things like stitch photos of a shag colony together to count nests etc. While there are several good commercial products available (Arcsoft panorama Maker 4 being my personal choice), I just found "Hugin" - a free, open source program that is rather good for a number of reasons.
- It's free
- It is downloadable as a zip file
- Doesn't require installing - just run from a directory or even a memory stick
Check out
http://hugin.sourceforge.net/ for download, instructions and tutorials. For best results you also need to downlad a control point creator (matches up points automatically) and links to two free programs are provided. I just copied everything into one directory for ease of finding. When you run the program for thre first time (at least for V 0.7) it asks you where various components are located. Point to them in your directory and it'll remember them thereafter.
Enjoy!