TeX Catalogue

  http://tug.ctan.org/tex-archive/help/Catalogue

Building your own layout: Memoire

  http://tug.ctan.org/tex-archive/macros/latex/contrib/memoir/

Creating Presentations: Beamer

  http://bitbucket.org/rivanvx/beamer/wiki/Home

Type setting Isotopes: Isotope

  http://tug.ctan.org/tex-archive/macros/latex/contrib/isotope/

Macros for typesetting high energy physics particle names.

  http://tug.ctan.org/tex-archive/macros/latex/contrib/hepparticles/

Managing acronyms

  http://tug.ctan.org/tex-archive/macros/latex/contrib/acronym/

About Typesetting of Tables

  http://tug.ctan.org/tex-archive/help/Catalogue/bytopic.html#settables
  http://tug.ctan.org/tex-archive/help/Catalogue/entries/tabsatz

XyMTeX System for Drawing Chemical Structures

  http://xymtex.com/fujitas3/xymtex/indexe.html