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
Help 2 Speak is a free conversation guide to translations from and to English, French, German etc .
Through an intuitive user interface, take the basics of the conversation in a foreign language everywhere with you and speak in the most common situations
Nokia Mobile dictionary is a dictionary application for translating words from one language to another. In addition to pre-installed language(s) you may download additional dictionary languages from this page.
The dictionary application allows you to have English and two user-defined languages on your device at the same time
Navita is a free five language translator for your Blackberry. Its similar to bbtrans also made with a very simple interface. I don't know what translation engine they are using but it seems to be okay and fast enough. My officemate claims the German translation works well and is usable
WordCorrector is a tool for modifying the built-in auto-correction dictionary. The auto-correction dictionary is usually used for correcting commonly mispelled words when you type in most text-based programs
Google Translate widget lets you get quickly translation on your preferred language. Enter the text you want to translate then choose the language you want to translate it to.
this widget is that it auto detects the source language and you have to only select the output language
FreeTranslator PocketPC: A free translator similar to Babylon Translator (TM). It translates various languages like Italian, English, French, Danish, Swedish, Finnish, German, Spnish, Russian, Greek, Korean, Japanese, Polish, Dutch, Arabian, Afrikaans, Bulgarian, Czech, Indonesian, Welsh, SerboCroat, Ainu and much more!
PalmOpenDic - is a PalmOS dictionary application that can be used to view (and search in) dictionaries which are stored in compressed form on your Palm Storage Memory or on an expansion card.
The whole application requires about 16K of storage memory, excluding databases, of course