This topic contains packages with macros to build a format.
A system for writing Armenian with TeX and LaTeX.
Definitive source of Plain TeX on CTAN.
A document preparation system.
The ConTeXt macro package.
LaTeX support for Czech/Slovak typesetting.
Plain TeX multilanguage support.
Extended plain TeX macros.
A restricted LaTeX system that also produces HTML.
Extended Plain TeX for use with MLTeX.
LaTeX3 programming conventions.
A merge of the best in AMS-TeX and LaTeX.
A TeX macro package that defines LaTeX.
Old, unsupported, LaTeX.
Base sources of LaTeX.
Development pre-release of the LaTeX kernel.
LaTeX release emulation.
TeX made easy.
Polish formats for TeX.
LaTeX support for MLTeX.
Make a format containing a document's preamble.
Build a format based on the preamble of a LaTeX file.
The PHYSE format.
A TeX format for physicists.
The Plain TeX format.
pLaTeX2ε and miscellaneous macros for pTeX.
A TeX format for physics papers.
Plain TeX format for pTeX and e-pTeX.
An XML-inspired format for student use.
An Infrastructure for Semantic Preloading of LaTeX Documents.
Texinfo documentation system.
Current releases of texinfo.tex and texi2dvi.
Plain TeX macros for Physicists.
TeX format from Washington State University.
Unpacked copy of the LaTeX sources.
pLaTeX2ε and miscellaneous macros for upTeX.
Plain TeX formats and documents for upTeX.
Tools to produce formats that read Polish language input.
Macro package developed at MIT.