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.
The DejaVu fonts are a font family based on the Bitstream Vera Fonts. Its purpose is to provide a wider range of characters while maintaining the original look and feel. The family is available as TrueType fonts and also as third-party packages for various operating systems, including handhelds.
FIGlet is a program for making large letters out of ordinary text. It prints its input using large characters made up of ordinary screen characters. FIGlet output is generally reminiscent of the sort of "signatures" many people like to put at the end of email and UseNet messages. It is also reminiscent of the output of some banner programs, although it is oriented normally, not sideways.
rxvt-unicode is a clone of the well known terminal emulator rxvt, modified to store text in Unicode and to use locale-correct input and output. It also supports mixing multiple fonts at the same time, including Xft fonts, real transparency, and an optional embedded Perl interpreter that allows you to extend your terminal easily.
FONTpage is a utility for viewing, managing, and generating images of fonts. It can install and delete per-user fonts as well as (when run as root) system-wide fonts. It displays fonts, has a full alpha-numeric popup window, and allows you to change the font size and color, background color, font face, bold, and italics. It also has the ability to input the text to be displayed, which you can choose to save as a PNG file. It is handy to view fonts and styles quickly, or to make "logo" graphics. And naturally, it is a simple way to try out fonts without dipping into the command line. The source code as well as Slackware packages are available.
gbdfed is a GTK+-based BDF font editor. Multiple fonts can be loaded from the command line. Multiple fonts can be open at the same time. Cutting and pasting glyphs between fonts, font name and property editing, and built-in online help. It imports PK/GF, HBF, PSF, CP, Linux FNT, VFONT, OpenType/TrueType, and some FON/FNT fonts. It can export PSF2 fonts.
The IDAutomation UPC/EAN Font Advantage Package is a professional, advanced font set with tools, macros, and source code that uses a single font file to create UPC-A, UPC-E, EAN-8, EAN-13, EAN-14, JAN, ISBN, and Bookland bar codes. This package uses IDAutomation's patent pending font technology to produce extremely high quality barcodes, even on low resolution printers. It contains several font versions in many font formats, including TrueType, PostScript, OpenType, and PCL.