fnsam is a Ghostscript font browser that creates a set of HTML pages, each showing samples of twenty fonts (Type1, TrueType, and others that are available to Ghostscript). You can quickly browse your fonts using a HTML browser, and click a sample to view that font's complete character set. A separate script is available that lists detailed info about a particular font.
The fontutils package includes the programs bpltobzr, bzrto, charspace, fontconvert, gsrenderfont, imageto, imgrotate, limn, and xbfe. These create fonts for use with Ghostscript or TeX (starting with a scanned type image and converting the bitmaps to outlines), convert between font formats, etc. The package also includes the libraries libbzr.a, libgf.a, libpbm.a, libpk.a, libtfm.a, and libwidgets.a.
GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.
webFonts4Linux is a shell scripts that automates the process of downloading and installing Microsoft's Web Core Fonts, a collection of high-quality True Type fonts designed for use with low resolutions. webFonts2Linux exists because although these Microsoft distributes these fonts for free, strong redistribution restrictions makes it impossible to distribute a tarball or package containing them.
The ClearlyU family of bitmap fonts provides a set of 12 pt, 100 dpi proportional BDF fonts with many of the glyphs needed for Unicode text (including numerous alternate glyphs and other glyphs not encoded in Unicode that are necessary to actually display certain scripts, e.g., Arabic or Devanagari).
Alphabet Soup is a project which attempts to determine a number of things about the shapes of letters in several different writing systems. First, it hypothesizes a set of basic building blocks that all letters are built up from. Second, it hypothesizes a set of rules, a grammar or syntax, which defines how those pieces combine to make different letters. It can generate individual letters, randomize letters in an input string to create weird but readable text, or generate random strings of symbols.