Fondu 051010 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app is an intellectual property of fondu.sourceforge.net. We recommend checking the downloaded files with any free antivirus. Fondu for Mac relates to System Tools.
From the developer:
Fondu is a set of programs to interconvert between Mac font formats and pfb, ttf, otf and bdf files on UNIX.
Dealing with Mac fonts is hard on other operating systems because Mac fonts are stored in the resource fork, and other operating systems do not support this concept. Fondu will extract the resource fork from either a macbinary file or a binhex file. Ufond will create a resource fork inside a macbinary file.
You may want to check out more software for Mac, such as ASCII:edit or Fontographer, which might be similar to Fondu.