The 6.0 version of StitcherUnlimited for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This software for Mac OS X was originally designed by Autodesk Inc. The program is categorized as Design & Photo Tools.
From the developer:
Autodesk Stitcher Unlimited photo stitching software offers professionals and enthusiasts easy-to-use tools for creating high-quality panoramas. From dramatic backdrops for film and game productions, to stunning images for artistic display, Autodesk Stitcher Unlimited panorama software can automatically assemble a wide variety of images.
You may want to check out more Mac applications, such as 3D Image Commander, UnCoverIt or TurboCAD Mac Designer, which might be related to StitcherUnlimited.