If PDF is electronic paper, then pdftk is an electronic staple-remover, hole-punch, binder, secret-decoder-ring, and X-Ray-glasses. Pdftk is a simple tool for doing everyday things with PDF documents. · http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/

Notizen zur Konfiguration des GNU Emacs als Aufgaben- und Terminverwaltung · http://suenkler.info/emacs-orgmode.html

It is basically a markdown to anything converter. In addition to markdown it handles raw LaTeX, thus math can be set using LaTeX (and AMS) environments. In addition to LaTeX and ePub it will create odt, docx or docbook output. How much math survives depends on the output format. (This may be bad news for ePub output.) There is even a LaTeX reader which can be used to convert the original LaTeX document to markdown. But be prepared to lose math, images and tables. There is an article in the TUGboat 32:3 (2011) that describes the use of pandoc to generate LaTeX output. (There are articles about converting LaTeX to ePub and using PDF on various ebook readers as well.) · http://johnmacfarlane.net/pandoc/

MusiXTeX, created by Daniel Taupin, Ross Mitchell, and Andreas Egler, is a set of macros and fonts that enables TeX to typeset music. To use it, at a minimum you must copy the macro and font files to the right directories in your particular TeX file structure, have the binary musixflx available to run, and have a TeX input file containing the proper commands. It's a three pass system: TeX, musixflx, then TeX again. To simplify inputting instrumental music there is the preprocessor PMX by Don Simons, which creates a TeX input file. For vocal music, there is M-Tx, a preprocessor for PMX by Dirk Laurie. It provides easy access to the functionality of the TeX macro package for lyrics called musixlyr, by Rainer Dunker. This page has short descriptions of most of the current files. Experienced users or those seeking an older file may wish to bypass this page and browse the directory. That is the only access to some older versions of current software (many past versions of MusiXTeX, useful for tracking changes), files for MusiXTeX's historical predecessors MusicTeX and MuTeX, and some other files that are not linked to from any web pages. · http://www.icking-music-archive.org/software/indexmt6.html