Truetype and OpenType specifications are available from Microsoft and Postscript specification from Adobe. See also Truetype typography.

For more informations about Unicode and character code charts use in fonts, go to the unicode homepage.

Some Microsoft tools can be used for manipuling TTF.

The AFDKO (Adobe Font Development Kit for OpenType) is to share the tools used by Adobe font developers for wrapping up PostScript fonts as OpenType/CFF font files, and adding OpenType layout features. These tools are used for in-house development of new Adobe OpenType fonts.

The TThmachine (free beta version) is a tool for applying hinting instructions to TrueType fonts. See also the other commercial products.

TTX is a tool to convert OpenType and TrueType fonts to and from XML. FontTools is a library for manipulating fonts, written in Python. It supports TrueType, OpenType, AFM and to an extent Type 1 and some Mac-specific formats.

Type1 Utilities from LCDF Type Software. The LCDF Typetools package contains several command-line programs for manipulating PostScript Type 1 and PostScript-flavored OpenType fonts.

OT1Light is a free lightweight version of OT1 Font Manager. It includes basic features for installing/uninstalling fonts, checking some installation problems and explore folders to preview font files. (screen shot)

Font Xplorer is you need to find that perfect font for best work. You can get a detailed overview of all the fonts installed on your system or in a specific folder. Usefull to print professionally designed sample sheets listing of your fonts. Install or remove fonts...

Linotype fontxplorer is a font management software from Linotype foundry. See Also the Adobe Type Manager (ATM) Light on the same page. This one is a system software component that automatically generates high-quality screen font bitmaps from the PostScript outlines in Type 1 or OpenType format.

One address where find all you need about fonts, typographie, and ressources on the web: the fonts archive

An other great place: Internet Resources for POSTSCRIPT and GHOSTSCRIPT