Pftrack match moving trial works as a PLE version

When you register and download the evaluation version of PFTrack (PC/MAC/Linux) it will continue to work as a Personal Learning Edition (although with all exports disabled). You can save your project and work with the full functionality to learn about matchmoving. The commercial version is not cheap, although there is also a student version available.

Register for the trial/PLE version

This firm also sells a cheap version called PFHoe which is not free (about EUR 50), but is fast and streamlined and can be used in many cases.

As an historic aside, the software was originally developed in an academic project, called Icarus, where it was freely available for quite some time.