.pfb - Type 1 PostScript font
.ttf - TrueType Font
.fnt - Usually font file
.ofm - Adobe PostScript font description file
.otf - OpenType font file format
.afm - Adobe font metrics file
.frf - FontMonger intermediate font
.ffil - Mac OS X Data Fork Suitcase Format
file extension VF - TeX virtual font file
File extension VF description:
TeX is a typesetting language. Instead of visually formatting your text, you enter your manuscript text intertwined with TeX commands in a plain text file. You then run TeX to produce formatted output, such as a PDF file. Thus, in contrast to standard word processors, your document is a separate file that does not pretend to be a representation of the final typeset output, and so can be easily edited and manipulated.
