• hyphenation of words for 50+ languages,
• simple and powerfull font loading system (various sizes of fonts),
• TeX, pdfTeX, XeTeX and LuaTeX engines,
• math fonts simply loaded with full amstex-like features,
• three internal encodings (IL2 for Czech/Slovak languages, T1 for many languages with latin alphabet and Unicode in new TeX engines),
• natural UTF-8 input in pdfTeX using encTeX without any active characters,
• Czech and Slovak special typesetting features.

The author is Petr Olšák.