Collatinus

Collatinus is a free, open-source, multi-platform application (Mac, Windows, Ubuntu and Debian GNU/Linux) that is simple to install and easy to use.

Collatinus is both a lemmatiser and a morphological analyser of Latin texts: given a declined or conjugated form, it can find the word to look up in the dictionary to obtain its translation into another language, its different meanings, and all the other data usually provided by a dictionary.

In practice, it is especially useful for Latin teachers, who can very quickly distribute an unpublished text with lexical help to their students from a text outside the textbook. Students often use it to read Latin more easily when their lexical and morphological knowledge is still insufficient.

Main features
lemmatisation of Latin words or an entire Latin text,
translation of lemmas using the Latin dictionaries incorporated into the application,
display of quantities (long or short syllables) and inflections (declension or conjugation).