24/7 Tutor Lite language apps
Free language translator apps for the iPhoneTranslator app reviews
World Nomads (free)
24/7 tutor (free)
Cool Gorilla (99¢)
Word Roll (99¢)
Lonely Planet ($9.99)
Languages: 7 — Spanish, French, German, Italian, Mandarin Chinese, Japanese, and Brazilian Portuguese.
Usability: These are more aimed at full language learning than travel phrases, but if you click on the "study guide" for each category you are presented with dozens upon dozens of useful words, all with audio clip pronunciations.
Perhaps more useful are the "Phrases" series
Frustrations: It's only available in Spanish, French, and German—with more basic versions also available in Italian and Russian.
You can only get the "Lite" editions for free. The full-fledged "Tutor" apps (or the more handy "Phrases" apps) each cost $7.99 to $9.99—probably not worth it.