Font Files

File extension	File description	Developer/Producer
.abf	Adobe Binary Screen Font File	Adobe Systems
.acfm	Adobe Composite Font Metrics File	Adobe Systems
.afm	Adobe Font Metrics File	N/A
.amfm	Adobe Multiple Font Metrics File	Adobe Systems
.bdf	Glyph Bitmap Distribution Format	Adobe Systems
.cha	Character Layout File	N/A
.chr	Borland Character Set File	N/A
.compositefont	Windows Composite Font File	Microsoft
.dfont	Mac OS X Data Fork Font	N/A
.eot	Embedded OpenType Font	N/A
.etx	TeX Font Encoding File	N/A
.euf	Private Character Editor File	Microsoft
.f3f	Crazy Machines Font File	Viva Media
.ffil	Mac Font Suitcase	Apple
.fnt	Windows Font File	N/A
.fon	Generic Font File	N/A
.fot	Font Resource File	N/A
.gdr	Symbian OS Font File	N/A
.gf	METAFONT Bitmap File	N/A
.gxf	General CADD Pro Font File	General CADD Products
.lwfn	Adobe Type 1 Mac Font File	Adobe Systems
.mcf	Watchtower Library Font File	Watchtower Bible and Tract Society
.mf	METAFONT File	Donald Knuth
.mxf	Maxis Font File	Electronic Arts
.nftr	Nintendo DS Font Type File	N/A
.otf	OpenType Font	N/A
.pcf	PaintCAD Font	PaintCAD
.pfa	Printer Font ASCII File	N/A
.pfb	Printer Font Binary File	Adobe Systems
.pfm	Printer Font Metrics File	N/A
.pfr	Portable Font Resource File	Bitstream
.pk	Packed METAFONT File	N/A
.sfd	Spline Font Database File	FontForge
.sfp	Soft Font Printer File	N/A
.suit	Macintosh Font Suitcase	N/A
.tfm	TeX Font Metric File	N/A
.ttc	TrueType Font Collection	N/A
.tte	Private Character Editor File	Microsoft
.ttf	TrueType Font	Apple
.txf	Celestia Font Texture File	Celestia Development Team
.vfb	FontLab Studio Font File	FontLab
.vlw	Processing Font File	Processing
.vnf	Vision Numeric Font	Vision Numeric
.woff	Web Open Font Format File	WebFonts Working Group
.xfn	Ventura Printer Font	N/A
.xft	ChiWriter Printer Font	N/A
.ytf	Google Picasa Font Cache	Google