SeaThreePO utilizes Google's GTalk translation bots to provide a simple translation service. As the author says "Its translations aren't great, but would probably do in a pinch. They'll likely improve as Google improves its translation bots".
More about the SeaThreePO project you will find at: http://code.google
Renaixenca Translator - Autodetects language of one or several phrases and translates them to one of more than 50 possible languages. Uses Google Language Detection and Translator API. Note: Languages with special characters are only supported if your Android device has the fonts installed. New version includes more languages like Swahili, Welsh, Yiddish, Malay, ..
Dictionary.com- The Dictionary.com app delivers trusted reference content from Dictionary.com and Thesaurus.com. The app includes phonetic and audio pronunciations, spelling suggestions and our popular Word of the Day
MacDroid Translator - Autodetects language of one or several phrases and translates them to one of more than 50 possible languages. Uses Google Language Detection and Translator API. Note: Languages with special characters are only supported if your Android device has the fonts installed. New version includes more languages like Swahili, Welsh, Yiddish, Malay, ..
ProTranslate - Features: *Support for English Chinese Japanese French Russian German Dutch Greek Italian Spanish Italian and major languages. *Touch translated text for long and get copy/paste option
TransZilla is a free translator which uses Google Translate. The translator supports more than 50 languages. Use translator for words, sentences translation. Type text in translator and click GO
myTranslator is a translation application based on Google Translate API. Supports 58 language pairs. You can send the translated text via SMS, email, TweetDeck, IM, etc