This is a set of utilities and scripts for building, testing, and validating font files. They come from the DejaVu font project -- http://dejavu-fonts.org/
A brief description of them is available at http://dejavu-fonts.org/wiki/Font_utilities ... with a little time, I will import the same descriptions here and update them if need be.
The links on the wiki page above, however, are outdated and dead. The scripts are now online at http://sourceforge.net/p/dejavu/code/HEAD/tree/trunk/dejavu-fonts/scripts/
This is where I downloaded them.
There is not (IMO) a clear license attached to the contents of the scripts/ folder at the DejaVu SVN repository. In lieu of that, I have also imported the top-level LICENSE file, which deals primarily with the license on the fonts themselves. However, it does also state that the DejaVu contributions are in the public domain. If that STATEMENT applies to the scripts/ directory as well as to the additions to the DejaVu fonts, then the scripts are also public domain.
Ultimately, though, I'm not sure how useful these utilities will be in the wild, so it may not affect a lot of people. But at least they're here to study, if nothing else.