The publics resources by Petr Olsak are in directories:

  EAN, ean   ...  The TeX macro for EAN barcodes
  code128    ...  The TeX macro for Code128 barcodes
  a2ac       ...  The convertor afm formats to make composites (in C)
  bulletin   ...  My articles for the TeX bulletin of CSTUG
  csplain    ...  The Czech extension of the standard macro plain TeX.
  csr        ...  Czech sort program (in C)
  enctex     ...  The extension of TeX, reencoding enabled.
  mar        ...  Texts by my brother Martin
  mnu        ...  The DOS program for supporting bathches with menu.
  serial     ...  My articles in "Softwarove noviny" Journal
  slabikar   ...  The "hand-written" font for TeX and METAFONT
  tst        ...  Some texts from my book "Typograficky system TeX"
  tbn        ...  My book "TeXbook naruby" (dvi, ps, pdf)
  typo       ...  The article about "Good typesetting" (in Czech)
  t1accent   ...  The program for making accented letters at T1 level
  t1csfont   ...  CSfonts in T1 format made by t1accent
  vlna       ...  The program for adding a tie in TeX texts (in WEB)
  vyuka      ...  Local resources for teaching
  xpexeso    ...  The game PEXESO for X Window System