Two Drifters

To release a nice PDF helper, I want to include some fonts. As I want to leave the option open to SELL the PDF Helper, I have to make sure that the font licences allow me to do so.

For instance, the Microsoft Web Core Fonts package does not allow to package the fonts with a commercial product, thus increasing the value of the product.

First some file extensions demystified:

afm: Adobe Font Metrics file. Adds information to PostScript fonts (size, distance of individual characters, etc.) [German explanation]

pfb: PostScript Font Binary. (Postscript Type1) Includes outline information for the font. Goes with the pfm files.

pfm: PostScript Font Metrics file. Both files (pfb and pfm) are needed for Windows.

ttf: True Type Font. Developed by Apple Computers as an alternative to Postscript Type 1 fonts. They additionally support hinting (a technology to optimise screen viewing), thus they became the dominating standard.