The greektonoi mapping extends the betababel package or the babel polutonikogreek option to provide a simple way to insert ancient Greek texts with diacritical characters into your document using a similar method to the commonly used Beta Code transliteration but with much more freedom. It is designed especially for \XeTeX engine and it could also be used for fast and easy modification of monotonic greek texts to polytonic. The output text is natively unicode so it can be reused to any possible way. greektonoi.sty package provides, in addition to inserting greek accents and breathings, many other symbols used in greek numbers and arithmetic or in the greek archaic period. It could be used with greektonoi mapping or indepedently. More information will be available on http://myria.math.aegean.gr/labs/dt/ License is GPL3