If you study classical Latin or Greek you're going to find Diogenes really helpful. This program is a translation assistant that you can use to look up words and expressions in those two languages, using the official online resources and databases provided by the Packard Humanities Institute and the Thesaurus Linguae Graecae.
The program features several ways to query Latin and Greek databases, although the way they work sometimes is not clear and I ended up getting some cryptic database message errors which I wasn't sure how to avoid, as there's no documentation.
In any case, Diogenes offers very detailed answers including meaning, example of usage and other important informative elements that can be very useful when translating classical writers.
With some improvement, Diogenes would become the perfect alternative to paper dictionaries in classical translations.