Downloading LogoTrans 1.1 for Mac from our website was free. This free Mac app is a product of Language Engineering Company. LogoTrans for Mac lies within Education Tools, more precisely Teaching Tools.
From the developer:
LEC LogoTrans automatically translates text as you type. The program displays the original text in the source pane and the translated text in the translation pane. You can fine-tune the translation by selecting alternative translations for particular words (do this by right-clicking on the word you want to change, and then select the alternative translation you want to use).
You may want to check out more software for Mac, such as Dolce Music Flash Cards or dvcUniversity, which might be similar to LogoTrans.