9.4 Important LaTeX macros on CTAN

LaTeX-base
ftp://ctan.tug.org/tex-archive/macros/latex/base/
tools package
ftp://ctan.tug.org/tex-archive/macros/latex/packages/tools/
graphics package
ftp://ctan.tug.org/tex-archive/macros/latex/packages/graphics/
psnfss package
ftp://ctan.tug.org/tex-archive/macros/latex/packages/psnfss/
babel package
ftp.//ctan.tug.org/tex-archive/macros/latex/packages/babel/

Various other LaTeX packages are available from CTAN in the directories
ftp://ctan.tug.org/tex-archive/macros/latex/contrib/supported/
or
ftp://ctan.tug.org/tex-archive/macros/latex/contrib/other/