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Flpsed flpsed is a WYSIWYG pseudo PostScript editor. "Pseudo", because you can't remove or modify existing elements of a document. But it does let you add arbitrary text lines to existing PostScript documents. Added lines can later be reedited with flpsed. Using pdftops, one can convert PDF documents to PostScript and also add text to them. flpsed is useful for filling in forms, adding notes etc.

Gregorio The Gregorio project offers tools for the typesetting of Gregorian chant. These tools include:

• gabc: a brief notation for representing Gregorian chant
• GregorioTeX: a TeX style for typesetting scores
• GregorioXML: an XML representation of a Gregorian chant score

Markdown2 Markdown is a text-to-HTML filter; it translates an easy-to-read / easy-to-write structured text format into HTML. Markdown's text format is most similar to that of plain text email, and supports features such as headers, emphasis, code blocks, blockquotes, and links. This is a fast and complete Python implementation of the Markdown spec.

Mule 'mule' is a multilingual text editor supporting Japanese, Chinese (trad. and simpl.), Korean, Latin1-5, Greek, Hebrew, Cyrillic, Arabic, Thai, Vietnamese, Ethiopic, IPA. Included is a utility to convert multilingual text into standalone PS. The program is currently distributed as pert of the Emacs text editor.

PDF Editor Editor for manipulating PDF documents. GUI version + commandline interface. Scripting is used to a great extent in editor and almost anything can be scripted, it is possible to create own scripts or plugins.

Unicode Data Browser UnicodeDataBrowser is a browser for the UnicodeData.txt file, which contains much useful information but is not easily read by humans. It creates a scrollable table in which columns represent properties. The table may be sorted on any column. Abbreviations are expanded and characters cross-referenced in decomposition and casing fields are named. Regular expression search restricted to a selected column is available. The set of characters for which information is displayed may be restricted to those characters matching a regular expression on a specified property.

Xgawk An extension of GAWK, the GNU implementation of the AWK Programming Language, for processing XML data. XMLgawk is just one of the extensions that come with the xgawk distribution. The others are the PostgreSQL and the MPFR extension.