Nooj 3.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X was originally developed by Max Silberztein. Nooj for Mac lies within Developer Tools, more precisely IDE. We recommend checking the downloaded files with any free antivirus.
From the developer:
NooJ is a linguistic development environment that includes large-coverage dictionaries and grammars, and parses corpora in real time. The app includes tools to create and maintain large-coverage lexical resources, as well as morphological and syntactic grammars. Dictionaries and grammars are applied to texts in order to locate morphological, lexical and syntactic patterns and tag simple and compound words.
You may want to check out more Mac applications, such as PowerGlot, ChIDE or flex sdk 3, which might be similar to Nooj.