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Luc Devroye's homepage contains enough information about fonts and other things to sink a ship. This guy designed a bunch of free fonts, and his homepage has a lot of interesting links, information and commentary.
Scribus is an Open Source desktop publishing project. The project web site provides a list of high quality fonts.
Jim Land's homepage contains a lot of links to sites on PostScript and fonts.
The comp.fonts FAQ is the definitive font FAQ.
The (preliminary) True Type HOWTO -- an incomplete HOWTO dated June 1998. Included in this list for completeness.
Adobe's Postscript page is the definitive site on the PostScript standard.
Ghostscript's home page has a lot of information, and all the latest printer drivers.
Jim Land's homepage contains a lot of links to sites on PostScript and fonts.