oberdiek

The bundle comprises packages to provide:

bmpsize: get bitmap size and resolution data;
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;
engord: define counter-printing operations producing English ordinals;
eolgrab: collect arguments delimited by end of line;
flags: setting and clearing flags in bit fields and converting the bit field into a decimal number;
holtxdoc: extra documentation macros;
hypbmsec: bookmarks in sectioning commands;
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;
pdfcolparallel: fixes colour problems in package parallel;
pdfcolparcolumns: fixes colour problems in package parcolumns;
pdfcrypt: setting PDF encryption;
protecteddef: define a command that protected against expansion;
resizegather: automatically resize overly large equations;
rotchiffre: performs simple rotation cyphers;
scrindex: redefines environment "theindex" of package "index", if a class from KOMA-Script is loaded;
setouterhbox: set \hbox in outer horizontal mode;
settobox: getting box sizes;
stackrel: extensions of the \stackrel command;
stampinclude: selects the files for \include by inspecting the timestamp of the .aux file(s);
thepdfnumber: canonical numbers for use in PDF files and elsewhere;
twoopt: commands with two optional arguments;

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.