FontRenamer is free and renames truetype font files (*.ttf) to the real name of the typefaces. Meaningful file names are best for easy management.

Simply select a folder of font files and click Rename button. Arial bold italic.ttf instead of arialbi.ttf or Brush Script.ttf instead of brushscn.ttf.

FontRenamer is available in English and German language (auto detect).

That software doesn't record activities, doesn't require runtimes, doesn't require installation, doesn't write to the registry, doesn't modify files outside of its own directories, isn't adware.