davidmace/UniversalTranslator
This project is a universal translator that leverages Android's text to speech and speech to text technology as well as Yandex's translation capablities. The cool thing about these technologies is that they are all free and surprisingly accurate. This application allows two users speaking different languages to have a back-and-forth conversation with text and speech. In the future I hope to augment this technology so that it is sufficient to parse natural speech.
GitHub repository with 6 stars and 4 forks.