factura is a LaTeX class for typesetting and calculating invoices, taking into account requirements of SENIAT legislation (tax collector entity on the Bolivarian Republic of Venezuela). However, its use is not restricted to Venezuela because all variables and the displayed text can be redefined by invoking commands or editing.

The package provides commands so that the user of LuaLaTeX may position arbitrary content at any position specified by absolute coordinates on the page. The package draws a grid on each page of the document, to aid positioning (the grid may be disabled, for final copy using the command \placeatsetup).

The distribution includes a package and a Lua library that can together read OpenDocument spreadsheet documents as LaTeX tables. Cells in the tables may be processed by LaTeX macros, so that, for example, the package may be used for drawing some plots. The package uses Lua's zip library.

The package enables the user to add guillemets from several source (Polish cmr, Cyrillic cmr, lasy and ec) to the ae fonts. This was useful when the ae fonts were used to produce PDF files, since the additional guillemets exist in fonts available in Adobe Type 1 format.

The overpic environment is a cross between the LaTeX picture environment and the \includegraphics command of graphicx. The resulting picture environment has the same dimensions as the included graphic. LaTeX commands can be placed on the graphic at defined positions; a grid for orientation is available.

This package adds two user commands to standard PiCTeX. One command uses relative coordinates, thus eliminating the need to calculate the coordinate of every point manually as in standard PiCTeX. The other command modifies \plot to use a rule instead of dots if the line segment is horizontal or vertical.

This is an early package for using alternate input encodings. The author considers the package mostly obsolete, since most of its functions are taken by the inputenc package; however, inputenc doesn't support the roman8 and atari encodings, so umlaute remains the sole source of that support.

This package is an add-on to the MathTime a style to provide TeX support for the use of the MathTime fonts. The MathTime package has uppercase Greek letters hardwired to be upright and only upright; this package provides a switch to choose between the two kinds of Greek uppercase letters.

Erewhon is based on the Heuristica package, which is based in turn on Utopia. Erewhon adds a number of new features --- small caps in all styles rather than just regular, added figure styles (proportional, inferior, numerator, denominator) and superior letters. The size is 6% smaller than Heuristica, matching that of UtopiaStd.

In financial reports, text and currency amounts are regularly put in one table, e.g., a year balance or a profit-and-loss overview. This package provides the settings for automatically typesetting such columns, including the sum line (preceded by a rule of the correct width) using the specifier f.

This package provides macros beginning with the PS character, made active, which enable us to write the British or American English pronunciation as one can find it in the English Pronouncing Dictionary by Daniel Jones. There is an option to typeset the pronunciation in the style of Harrap's dictionary.

The package provides an easy way to take the remainder of a division operation without destroying the values of the counters containing the dividend and divisor. It also provides a way to take the integer quotient of a division operation without destroying the values of the counters containing the dividend and divisor.

Coolstr is a subpackage of the cool bundle that deals with the manipulation of strings. A string is defined as a sequence of characters (not tokens). The package provides the ability to access a specific character of a string, as well as determine if the string contains numeric or integer data.

The package provides 1, 2, 3, 4 and 5 variable Karnaugh maps, in the style used in numerous American textbooks on digital design. The package draws K-maps where the most significant input variables are placed on top of the columns and the least significant variables are placed left of the rows.

This package provides commands to typeset proof trees in the style of sequent calculus and related systems. The commands allow for writing inferences with any number of premises and alignment of successive formulas on an arbitrary point. Various options allow complete control over spacing, styles of inference rules, placement of labels, etc.

This package provides a LaTeX class and templates for books to be published at Springer Gabler Research, Springer Vieweg Research, Springer Spektrum Research, Springer VS Research, or Springer VS Forschung. It may be used to produce monographs in different formats and several-authors-books fitting the conditions of the aforementioned publishers.

The Lua-UCA library provides basic support for Unicode Collation Algorithm in Lua. It can be used to sort arrays of strings according to rules of particular languages. It can be used in other Lua projects that need to sort text in a language dependent way, like indexing processors, bibliographic generators, etc.

Texinfo is the preferred format for documentation in the GNU project; the format may be used to produce online or printed output from a single source. The Texinfo macros may be used to produce printable output using TeX; other programs in the distribution offer online interactive use (with hypertext linkages in some cases).

The combine class lets you bundle individual documents into a single document, such as when preparing a conference proceedings. The auxiliary combinet package puts the titles and authors from \maketitle commands into the main document's table of contents. The package cooperates with the abstract and titling packages.

This package provides a package for typesetting scholarly critical editions, replacing the established ledmac package. The package supports indexing by page and by line numbers, and simple tabular- and array-style environments. The package is distributed with the related eledpar package. The package is now superseded by reledmac.

This package provides an easy to use command. It takes an URL of the Research Organization Registry (ROR) as argument and creates a ROR symbol which links to the given URL---very similar to the orcidlink package from which it is derived. The symbol itself always fits with the chosen font size.

The package is intended for users needing to typeset a Dynkin Tree Diagram---a group theoretical construct consisting of cartan coefficients in boxes connected by a series of lines. Such a diagram is a tool for working out the states and their weights in terms of the fundamental weights and the simple roots.

By default, some of the tabbing environment's commands clash with default accent commands; LaTeX provides the odd commands \a', etc., to deal with the clash. The package offers a variant of the tabbing environment which does not create this difficulty, so that users need not learn two sets of accent commands.

Two files are compared and a new TeX file is output. When the output file is processed with (La)TeX it marks new changes with blue and old text with red with a strike-through line. Furthermore, passages with changes are marked at the margin with grey bars by the LaTeX changebar package.