The bundle comprises packages to provide:
– accsupp: better accessibility support for PDF files;
– aliascnt: ‘alias counters’;
– alphalph: multiple-alphabetic counting (a…z,aa…zz,… — up to the full extent of a TeX counter);
– askinclude: replaces \includeonly by an interactive user interface;
– atbegshi: a modern reimplementation of package everyshi;
– atenddvi: provides \AtEndDvi command;
– attachfile2: attach files to PDF files;
– atveryend: hooks the very end of a document;
– auxhook: stick stuff at the start of the .aux file;
– bigintcalc: expandable arithmetic operations with big integers that can exceed TeX's number limits;
– bitset: defines and implements the data type bit set, a vector of bits;
– bmpsize: get bitmap size and resolution data;
– bookmark: alternative bookmark (outline) organization for package hyperref;
– catchfile: collects the contents of a file and puts it in a macro;
– centernot: a horizontally-centred \not symbol;
– chemarr: extensible chemists’ reaction arrows;
– classlist: record information about document class(es) used;
– colonequals: poor man’s mathematical relation symbols;
– dvipscol: dvips colour stack management;
– embedfile: embed files in PDF documents;
– engord: define counter-printing operations producing English ordinals;
– epstopdf: conversion with epstopdf on the fly;
– etexcmds: adds a prefix to eTeX’s commands, to avoid conflicts with existing macros;
– flags: setting and clearing flags in bit fields and converting the bit field into a decimal number;
– gettitlestring: clean up the string containing the title of a section, etc.;
– grfext: macros for adding and reordering the list of graphics file extensions recognised by the graphics package;
– grffile: extend file name processing in the graphics bundle;
– hycolor: implements the color option stuff that is used by packages hyperref and bookmark;
– hypbmsec: bookmarks in sectioning commands;
– hypcap: anjusting anchors of captions;
– hypdestopt: optimising hyperref’s pdftex driver destinations;
– hypdoc: hyper-references in the LaTeX standard doc package;
– hypgotoe: experimental package for links to embedded files;
– hyphsubst: substitute hyphenation patterns;
– ifdraft: switch for option draft;
– iflang: provides expandable checks for the current language;
– ifluatex: looks for LuaTeX regardless of its mode and provides the switch \ifluatex;
– ifpdf: provides the ifpdf switch;
– ifvtex: provides the \ifvtex switch;
– infwarerr: provides a complete set of macros for informations, warnings and error messages with support for plain TeX;
– inputenx: enhanced handling of input encoding;
– intcalc: provides expandable arithmetic operations with integers;
– kvoptions: use package options in key value format ;
– kvsetkeys: a variant of the \setkeys command;
– letltxmacro: Let assignment for LaTeX macros;
– listingsutf8: (partially) extends the listings package to UTF-8 encoding;
– ltxcmds: exports some utility macros from the LaTeX kernel into a separate namespace and also provides them for other formats such as plain-TeX; – luacolor: implements colour support based on LuaTeX’s node attributes;
– luatex: the new and extended features and resources that LuaTeX provides;
– magicnum: allows to access magic numbers by a hierarchical name system;
– makerobust: make a command robust;
– pagegrid: prints a page grid in the background;
– pagesel: select pages of a document for output;
– pdfcolfoot: using pdftex’s color stack for footnotes;
– pdfcol: macros for setting and maintaining new color stacks;
– pdfcolmk: PDFTeX COLour MarK — fake a PDFTeX colour stack using marks (not needed for PDFTeX 1.40.0 and later);
– pdfcolparallel: fixes colour problems in package parallel;
– pdfcolparcolumns: fixes colour problems in package parcolumns;
– pdfcrypt: setting PDF encryption;
– pdfescape: pdfTeX’s escape features using TeX or e-TeX;
– pdflscape: landscape pages in PDF;
– pdftexcmds: provide PDFTeX primitives missing in LuaTeX;
– picture: dimens for picture macros;
– pmboxdraw: poor man’s box drawing characters;
– refcount: using the numeric values of references;
– rerunfilecheck: checksum based rerun checks on auxiliary files;
– resizegather: automatically resize overly large equations;
– scrindex: redefines environment ‘theindex’ of package ‘index’, if a class from KOMA-Script is loaded;
– selinput: select the input encoding by specifying pairs of input characters and their glyph names;
– setouterhbox: set \hbox in outer horizontal mode;
– settobox: getting box sizes;
– soulutf8: extends package soul and adds some support for UTF-8;
– stackrel: extensions of the \stackrel command;
– stampinclude: selects the files for \include by inspecting the timestamp of the .aux file(s);
– stringenc: provides \StringEncodingConvert for converting a string between different encodings;
– tabularht: tabulars with height specification;
– tabularkv: key value interface for tabular parameters;
– telprint: print German telephone directories;
– transparent: using a color stack for transparency with pdftex;
– twoopt: commands with two optional arguments;
– uniquecounter: provides unlimited unique counter;
– zref: a proposed new reference system.

Each of the packages is represented by two files, a .dtx (documented source) and a PDF file; the .ins file necessary for installation is extracted by running the .dtx file with Plain TeX.

The author is Heiko Oberdiek.