Master Typer for Mac

From Kekoa John Sylva:

Master Typer gives Macintosh users an alternative to ResEdit for changing the types of files. With the batch processing ability of Master Typer, Mac users can easily convert hundreds of files.

This batch processing capability is made more effective by a feature in Master Typer called directory sniffing. This feature allows Master Typer to quickly find all files within a given folder whether they are located at the base of that folder or are located in folders within the directory.